Finding the Fourth Proportional to 31,055.18, 42,856.12 and 16,908.02

Step by Step Solution

1. Step 1: Write the proportion equation
   31,055.18 : 42,856.12 = 16,908.02 : x
2. Step 2: Convert to fraction form
   31,055.18/42,856.12 = 16,908.02/x
3. Step 3: Cross multiply
   31,055.18x = 42,856.12 × 16,908.02
4. Step 4: Simplify right side
   31,055.18x = 724,612,134.08
5. Step 5: Solve for x
   x = 724,612,134.08/31,055.18
6. Step 6: Final answer
   x = 23,333.05