Finding the Fourth Proportional to 1,331,066.72, 1,837,248.89 and 787,391.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,331,066.72 : 1,837,248.89 = 787,391.50 : x
2. Step 2: Convert to fraction form
   1,331,066.72/1,837,248.89 = 787,391.50/x
3. Step 3: Cross multiply
   1,331,066.72x = 1,837,248.89 × 787,391.50
4. Step 4: Simplify right side
   1,331,066.72x = 1,446,634,171,447.85
5. Step 5: Solve for x
   x = 1,446,634,171,447.85/1,331,066.72
6. Step 6: Final answer
   x = 1,086,823.19