Finding the Fourth Proportional to 31,055.55, 42,856.41 and 16,908.36

Step by Step Solution

1. Step 1: Write the proportion equation
   31,055.55 : 42,856.41 = 16,908.36 : x
2. Step 2: Convert to fraction form
   31,055.55/42,856.41 = 16,908.36/x
3. Step 3: Cross multiply
   31,055.55x = 42,856.41 × 16,908.36
4. Step 4: Simplify right side
   31,055.55x = 724,631,608.59
5. Step 5: Solve for x
   x = 724,631,608.59/31,055.55
6. Step 6: Final answer
   x = 23,333.40