Finding the Fourth Proportional to 209,196.31, 288,693.17 and 113,703.03

Step by Step Solution

1. Step 1: Write the proportion equation
   209,196.31 : 288,693.17 = 113,703.03 : x
2. Step 2: Convert to fraction form
   209,196.31/288,693.17 = 113,703.03/x
3. Step 3: Cross multiply
   209,196.31x = 288,693.17 × 113,703.03
4. Step 4: Simplify right side
   209,196.31x = 32,825,288,169.31
5. Step 5: Solve for x
   x = 32,825,288,169.31/209,196.31
6. Step 6: Final answer
   x = 156,911.41