Finding the Fourth Proportional to 31,499.76, 43,469.91 and 17,159.88

Step by Step Solution

1. Step 1: Write the proportion equation
   31,499.76 : 43,469.91 = 17,159.88 : x
2. Step 2: Convert to fraction form
   31,499.76/43,469.91 = 17,159.88/x
3. Step 3: Cross multiply
   31,499.76x = 43,469.91 × 17,159.88
4. Step 4: Simplify right side
   31,499.76x = 745,938,439.21
5. Step 5: Solve for x
   x = 745,938,439.21/31,499.76
6. Step 6: Final answer
   x = 23,680.77