Finding the Fourth Proportional to 288,697.34, 433,018.15 and 88,964.10

Step by Step Solution

1. Step 1: Write the proportion equation
   288,697.34 : 433,018.15 = 88,964.10 : x
2. Step 2: Convert to fraction form
   288,697.34/433,018.15 = 88,964.10/x
3. Step 3: Cross multiply
   288,697.34x = 433,018.15 × 88,964.10
4. Step 4: Simplify right side
   288,697.34x = 38,523,069,058.56
5. Step 5: Solve for x
   x = 38,523,069,058.56/288,697.34
6. Step 6: Final answer
   x = 133,437.56