Finding the Fourth Proportional to 31,153.59, 42,991.40 and 17,724.56

Step by Step Solution

1. Step 1: Write the proportion equation
   31,153.59 : 42,991.40 = 17,724.56 : x
2. Step 2: Convert to fraction form
   31,153.59/42,991.40 = 17,724.56/x
3. Step 3: Cross multiply
   31,153.59x = 42,991.40 × 17,724.56
4. Step 4: Simplify right side
   31,153.59x = 762,003,345.20
5. Step 5: Solve for x
   x = 762,003,345.20/31,153.59
6. Step 6: Final answer
   x = 24,459.57