Finding the Fourth Proportional to 31,060.08, 42,862.56 and 16,912.88

Step by Step Solution

1. Step 1: Write the proportion equation
   31,060.08 : 42,862.56 = 16,912.88 : x
2. Step 2: Convert to fraction form
   31,060.08/42,862.56 = 16,912.88/x
3. Step 3: Cross multiply
   31,060.08x = 42,862.56 × 16,912.88
4. Step 4: Simplify right side
   31,060.08x = 724,929,333.77
5. Step 5: Solve for x
   x = 724,929,333.77/31,060.08
6. Step 6: Final answer
   x = 23,339.58