Finding the Fourth Proportional to 31,407.97, 43,342.23 and 17,978.37

Step by Step Solution

1. Step 1: Write the proportion equation
   31,407.97 : 43,342.23 = 17,978.37 : x
2. Step 2: Convert to fraction form
   31,407.97/43,342.23 = 17,978.37/x
3. Step 3: Cross multiply
   31,407.97x = 43,342.23 × 17,978.37
4. Step 4: Simplify right side
   31,407.97x = 779,222,647.57
5. Step 5: Solve for x
   x = 779,222,647.57/31,407.97
6. Step 6: Final answer
   x = 24,809.71