Finding the Fourth Proportional to 31,060.16, 42,861.70 and 16,913

Step by Step Solution

1. Step 1: Write the proportion equation
   31,060.16 : 42,861.70 = 16,913 : x
2. Step 2: Convert to fraction form
   31,060.16/42,861.70 = 16,913/x
3. Step 3: Cross multiply
   31,060.16x = 42,861.70 × 16,913
4. Step 4: Simplify right side
   31,060.16x = 724,919,932.10
5. Step 5: Solve for x
   x = 724,919,932.10/31,060.16
6. Step 6: Final answer
   x = 23,339.22