Finding the Fourth Proportional to 209,008.89, 288,434.39 and 113,517.45

Step by Step Solution

1. Step 1: Write the proportion equation
   209,008.89 : 288,434.39 = 113,517.45 : x
2. Step 2: Convert to fraction form
   209,008.89/288,434.39 = 113,517.45/x
3. Step 3: Cross multiply
   209,008.89x = 288,434.39 × 113,517.45
4. Step 4: Simplify right side
   209,008.89x = 32,742,335,877.52
5. Step 5: Solve for x
   x = 32,742,335,877.52/209,008.89
6. Step 6: Final answer
   x = 156,655.23