Finding the Fourth Proportional to 209,111.06, 288,574.56 and 113,617.70

Step by Step Solution

1. Step 1: Write the proportion equation
   209,111.06 : 288,574.56 = 113,617.70 : x
2. Step 2: Convert to fraction form
   209,111.06/288,574.56 = 113,617.70/x
3. Step 3: Cross multiply
   209,111.06x = 288,574.56 × 113,617.70
4. Step 4: Simplify right side
   209,111.06x = 32,787,177,785.71
5. Step 5: Solve for x
   x = 32,787,177,785.71/209,111.06
6. Step 6: Final answer
   x = 156,793.13