Finding the Fourth Proportional to 288,773.32, 433,131.42 and 89,039.80

Step by Step Solution

1. Step 1: Write the proportion equation
   288,773.32 : 433,131.42 = 89,039.80 : x
2. Step 2: Convert to fraction form
   288,773.32/433,131.42 = 89,039.80/x
3. Step 3: Cross multiply
   288,773.32x = 433,131.42 × 89,039.80
4. Step 4: Simplify right side
   288,773.32x = 38,565,935,010.52
5. Step 5: Solve for x
   x = 38,565,935,010.52/288,773.32
6. Step 6: Final answer
   x = 133,550.89