Finding the Fourth Proportional to 209,066.58, 288,510.30 and 113,573.97

Step by Step Solution

1. Step 1: Write the proportion equation
   209,066.58 : 288,510.30 = 113,573.97 : x
2. Step 2: Convert to fraction form
   209,066.58/288,510.30 = 113,573.97/x
3. Step 3: Cross multiply
   209,066.58x = 288,510.30 × 113,573.97
4. Step 4: Simplify right side
   209,066.58x = 32,767,260,156.89
5. Step 5: Solve for x
   x = 32,767,260,156.89/209,066.58
6. Step 6: Final answer
   x = 156,731.22