Finding the Fourth Proportional to 209,128.32, 288,598.91 and 113,635.02

Step by Step Solution

1. Step 1: Write the proportion equation
   209,128.32 : 288,598.91 = 113,635.02 : x
2. Step 2: Convert to fraction form
   209,128.32/288,598.91 = 113,635.02/x
3. Step 3: Cross multiply
   209,128.32x = 288,598.91 × 113,635.02
4. Step 4: Simplify right side
   209,128.32x = 32,794,942,909.83
5. Step 5: Solve for x
   x = 32,794,942,909.83/209,128.32
6. Step 6: Final answer
   x = 156,817.32