Finding the Fourth Proportional to 208,812.91, 288,162 and 113,319.61

Step by Step Solution

1. Step 1: Write the proportion equation
   208,812.91 : 288,162 = 113,319.61 : x
2. Step 2: Convert to fraction form
   208,812.91/288,162 = 113,319.61/x
3. Step 3: Cross multiply
   208,812.91x = 288,162 × 113,319.61
4. Step 4: Simplify right side
   208,812.91x = 32,654,404,016.01
5. Step 5: Solve for x
   x = 32,654,404,016.01/208,812.91
6. Step 6: Final answer
   x = 156,381.16