Finding the Fourth Proportional to 31,128.55, 42,958.60 and 17,701.02

Step by Step Solution

1. Step 1: Write the proportion equation
   31,128.55 : 42,958.60 = 17,701.02 : x
2. Step 2: Convert to fraction form
   31,128.55/42,958.60 = 17,701.02/x
3. Step 3: Cross multiply
   31,128.55x = 42,958.60 × 17,701.02
4. Step 4: Simplify right side
   31,128.55x = 760,410,993.52
5. Step 5: Solve for x
   x = 760,410,993.52/31,128.55
6. Step 6: Final answer
   x = 24,428.09