Finding the Fourth Proportional to 31,139.04, 42,970.56 and 17,708.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,139.04 : 42,970.56 = 17,708.42 : x
2. Step 2: Convert to fraction form
   31,139.04/42,970.56 = 17,708.42/x
3. Step 3: Cross multiply
   31,139.04x = 42,970.56 × 17,708.42
4. Step 4: Simplify right side
   31,139.04x = 760,940,724.12
5. Step 5: Solve for x
   x = 760,940,724.12/31,139.04
6. Step 6: Final answer
   x = 24,436.87