Finding the Fourth Proportional to 31,239.71, 43,109.73 and 17,815.29

Step by Step Solution

1. Step 1: Write the proportion equation
   31,239.71 : 43,109.73 = 17,815.29 : x
2. Step 2: Convert to fraction form
   31,239.71/43,109.73 = 17,815.29/x
3. Step 3: Cross multiply
   31,239.71x = 43,109.73 × 17,815.29
4. Step 4: Simplify right side
   31,239.71x = 768,012,341.77
5. Step 5: Solve for x
   x = 768,012,341.77/31,239.71
6. Step 6: Final answer
   x = 24,584.49