Finding the Fourth Proportional to 31,055.16, 42,856.12 and 16,908

Step by Step Solution

1. Step 1: Write the proportion equation
   31,055.16 : 42,856.12 = 16,908 : x
2. Step 2: Convert to fraction form
   31,055.16/42,856.12 = 16,908/x
3. Step 3: Cross multiply
   31,055.16x = 42,856.12 × 16,908
4. Step 4: Simplify right side
   31,055.16x = 724,611,276.96
5. Step 5: Solve for x
   x = 724,611,276.96/31,055.16
6. Step 6: Final answer
   x = 23,333.04