Finding the Fourth Proportional to 1,288,103.76, 1,777,513.80 and 715,107.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,288,103.76 : 1,777,513.80 = 715,107.02 : x
2. Step 2: Convert to fraction form
   1,288,103.76/1,777,513.80 = 715,107.02/x
3. Step 3: Cross multiply
   1,288,103.76x = 1,777,513.80 × 715,107.02
4. Step 4: Simplify right side
   1,288,103.76x = 1,271,112,604,313.15
5. Step 5: Solve for x
   x = 1,271,112,604,313.15/1,288,103.76
6. Step 6: Final answer
   x = 986,809.17