Finding the Fourth Proportional to 209,066.34, 288,509.96 and 113,573.72

Step by Step Solution

1. Step 1: Write the proportion equation
   209,066.34 : 288,509.96 = 113,573.72 : x
2. Step 2: Convert to fraction form
   209,066.34/288,509.96 = 113,573.72/x
3. Step 3: Cross multiply
   209,066.34x = 288,509.96 × 113,573.72
4. Step 4: Simplify right side
   209,066.34x = 32,767,147,403.83
5. Step 5: Solve for x
   x = 32,767,147,403.83/209,066.34
6. Step 6: Final answer
   x = 156,730.86