Finding the Fourth Proportional to 31,055.61, 42,856.92 and 16,908.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,055.61 : 42,856.92 = 16,908.42 : x
2. Step 2: Convert to fraction form
   31,055.61/42,856.92 = 16,908.42/x
3. Step 3: Cross multiply
   31,055.61x = 42,856.92 × 16,908.42
4. Step 4: Simplify right side
   31,055.61x = 724,642,803.27
5. Step 5: Solve for x
   x = 724,642,803.27/31,055.61
6. Step 6: Final answer
   x = 23,333.72