Finding the Fourth Proportional to 989,498.88, 1,365,505.56 and 536,789.76

Step by Step Solution

1. Step 1: Write the proportion equation
   989,498.88 : 1,365,505.56 = 536,789.76 : x
2. Step 2: Convert to fraction form
   989,498.88/1,365,505.56 = 536,789.76/x
3. Step 3: Cross multiply
   989,498.88x = 1,365,505.56 × 536,789.76
4. Step 4: Simplify right side
   989,498.88x = 732,989,401,831.07
5. Step 5: Solve for x
   x = 732,989,401,831.07/989,498.88
6. Step 6: Final answer
   x = 740,768.30