Finding the Fourth Proportional to 31,139.56, 42,973.51 and 16,993.32

Step by Step Solution

1. Step 1: Write the proportion equation
   31,139.56 : 42,973.51 = 16,993.32 : x
2. Step 2: Convert to fraction form
   31,139.56/42,973.51 = 16,993.32/x
3. Step 3: Cross multiply
   31,139.56x = 42,973.51 × 16,993.32
4. Step 4: Simplify right side
   31,139.56x = 730,262,457.04
5. Step 5: Solve for x
   x = 730,262,457.04/31,139.56
6. Step 6: Final answer
   x = 23,451.28