Finding the Fourth Proportional to 288,597, 432,901.98 and 99,057

Step by Step Solution

1. Step 1: Write the proportion equation
   288,597 : 432,901.98 = 99,057 : x
2. Step 2: Convert to fraction form
   288,597/432,901.98 = 99,057/x
3. Step 3: Cross multiply
   288,597x = 432,901.98 × 99,057
4. Step 4: Simplify right side
   288,597x = 42,881,971,432.86
5. Step 5: Solve for x
   x = 42,881,971,432.86/288,597
6. Step 6: Final answer
   x = 148,587.72