Finding the Fourth Proportional to 288,870.24, 433,316.88 and 89,172.96

Step by Step Solution

1. Step 1: Write the proportion equation
   288,870.24 : 433,316.88 = 89,172.96 : x
2. Step 2: Convert to fraction form
   288,870.24/433,316.88 = 89,172.96/x
3. Step 3: Cross multiply
   288,870.24x = 433,316.88 × 89,172.96
4. Step 4: Simplify right side
   288,870.24x = 38,640,148,807.56
5. Step 5: Solve for x
   x = 38,640,148,807.56/288,870.24
6. Step 6: Final answer
   x = 133,763.00