Finding the Fourth Proportional to 31,407.13, 43,341.71 and 17,978.61

Step by Step Solution

1. Step 1: Write the proportion equation
   31,407.13 : 43,341.71 = 17,978.61 : x
2. Step 2: Convert to fraction form
   31,407.13/43,341.71 = 17,978.61/x
3. Step 3: Cross multiply
   31,407.13x = 43,341.71 × 17,978.61
4. Step 4: Simplify right side
   31,407.13x = 779,223,700.82
5. Step 5: Solve for x
   x = 779,223,700.82/31,407.13
6. Step 6: Final answer
   x = 24,810.41