Finding the Fourth Proportional to 209,066.59, 288,510.30 and 113,573.96

Step by Step Solution

1. Step 1: Write the proportion equation
   209,066.59 : 288,510.30 = 113,573.96 : x
2. Step 2: Convert to fraction form
   209,066.59/288,510.30 = 113,573.96/x
3. Step 3: Cross multiply
   209,066.59x = 288,510.30 × 113,573.96
4. Step 4: Simplify right side
   209,066.59x = 32,767,257,993.06
5. Step 5: Solve for x
   x = 32,767,257,993.06/209,066.59
6. Step 6: Final answer
   x = 156,731.20