Finding the Fourth Proportional to 288,736.32, 433,151.18 and 89,009.98

Step by Step Solution

1. Step 1: Write the proportion equation
   288,736.32 : 433,151.18 = 89,009.98 : x
2. Step 2: Convert to fraction form
   288,736.32/433,151.18 = 89,009.98/x
3. Step 3: Cross multiply
   288,736.32x = 433,151.18 × 89,009.98
4. Step 4: Simplify right side
   288,736.32x = 38,554,777,868.78
5. Step 5: Solve for x
   x = 38,554,777,868.78/288,736.32
6. Step 6: Final answer
   x = 133,529.37