Finding the Fourth Proportional to 209,002.49, 288,442.24 and 118,380.50

Step by Step Solution

1. Step 1: Write the proportion equation
   209,002.49 : 288,442.24 = 118,380.50 : x
2. Step 2: Convert to fraction form
   209,002.49/288,442.24 = 118,380.50/x
3. Step 3: Cross multiply
   209,002.49x = 288,442.24 × 118,380.50
4. Step 4: Simplify right side
   209,002.49x = 34,145,934,854.16
5. Step 5: Solve for x
   x = 34,145,934,854.16/209,002.49
6. Step 6: Final answer
   x = 163,375.74