Finding the Fourth Proportional to 31,156.95, 42,999.05 and 17,728.77

Step by Step Solution

1. Step 1: Write the proportion equation
   31,156.95 : 42,999.05 = 17,728.77 : x
2. Step 2: Convert to fraction form
   31,156.95/42,999.05 = 17,728.77/x
3. Step 3: Cross multiply
   31,156.95x = 42,999.05 × 17,728.77
4. Step 4: Simplify right side
   31,156.95x = 762,320,267.67
5. Step 5: Solve for x
   x = 762,320,267.67/31,156.95
6. Step 6: Final answer
   x = 24,467.10