Finding the Fourth Proportional to 31,055.86, 42,856.98 and 16,908.70

Step by Step Solution

1. Step 1: Write the proportion equation
   31,055.86 : 42,856.98 = 16,908.70 : x
2. Step 2: Convert to fraction form
   31,055.86/42,856.98 = 16,908.70/x
3. Step 3: Cross multiply
   31,055.86x = 42,856.98 × 16,908.70
4. Step 4: Simplify right side
   31,055.86x = 724,655,817.73
5. Step 5: Solve for x
   x = 724,655,817.73/31,055.86
6. Step 6: Final answer
   x = 23,333.95