Finding the Third Proportional to 865,243,078,644 and 1,271,945,708,826

Step by Step Solution

1. Step 1: Write the proportion equation
   865,243,078,644 : 1,271,945,708,826 = 1,271,945,708,826 : x
2. Step 2: Convert to fraction form
   865,243,078,644/1,271,945,708,826 = 1,271,945,708,826/x
3. Step 3: Cross multiply
   865,243,078,644x = 1,271,945,708,826 × 1,271,945,708,826
4. Step 4: Simplify right side
   865,243,078,644x = 1,617,845,886,200,875,675,811,840
5. Step 5: Solve for x
   x = 1,617,845,886,200,875,675,811,840/865,243,078,644
6. Step 6: Final answer
   x = 1,869,816,617,009.35