Finding the Fourth Proportional to 209,002.48, 288,426.72 and 118,355.99

Step by Step Solution

1. Step 1: Write the proportion equation
   209,002.48 : 288,426.72 = 118,355.99 : x
2. Step 2: Convert to fraction form
   209,002.48/288,426.72 = 118,355.99/x
3. Step 3: Cross multiply
   209,002.48x = 288,426.72 × 118,355.99
4. Step 4: Simplify right side
   209,002.48x = 34,137,028,989.75
5. Step 5: Solve for x
   x = 34,137,028,989.75/209,002.48
6. Step 6: Final answer
   x = 163,333.13