Finding the Fourth Proportional to 209,009.86, 288,428.86 and 113,514.50

Step by Step Solution

1. Step 1: Write the proportion equation
   209,009.86 : 288,428.86 = 113,514.50 : x
2. Step 2: Convert to fraction form
   209,009.86/288,428.86 = 113,514.50/x
3. Step 3: Cross multiply
   209,009.86x = 288,428.86 × 113,514.50
4. Step 4: Simplify right side
   209,009.86x = 32,740,857,828.47
5. Step 5: Solve for x
   x = 32,740,857,828.47/209,009.86
6. Step 6: Final answer
   x = 156,647.43