Finding the Fourth Proportional to 209,057.76, 288,501.72 and 113,566.32

Step by Step Solution

1. Step 1: Write the proportion equation
   209,057.76 : 288,501.72 = 113,566.32 : x
2. Step 2: Convert to fraction form
   209,057.76/288,501.72 = 113,566.32/x
3. Step 3: Cross multiply
   209,057.76x = 288,501.72 × 113,566.32
4. Step 4: Simplify right side
   209,057.76x = 32,764,078,654.07
5. Step 5: Solve for x
   x = 32,764,078,654.07/209,057.76
6. Step 6: Final answer
   x = 156,722.61