Finding the Third Proportional to 865,243,078,704 and 1,271,945,708,919

Step by Step Solution

1. Step 1: Write the proportion equation
   865,243,078,704 : 1,271,945,708,919 = 1,271,945,708,919 : x
2. Step 2: Convert to fraction form
   865,243,078,704/1,271,945,708,919 = 1,271,945,708,919/x
3. Step 3: Cross multiply
   865,243,078,704x = 1,271,945,708,919 × 1,271,945,708,919
4. Step 4: Simplify right side
   865,243,078,704x = 1,617,845,886,437,457,506,861,056
5. Step 5: Solve for x
   x = 1,617,845,886,437,457,506,861,056/865,243,078,704
6. Step 6: Final answer
   x = 1,869,816,617,153.11