Finding the Fourth Proportional to 31,155.12, 42,992.24 and 17,005.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,155.12 : 42,992.24 = 17,005.12 : x
2. Step 2: Convert to fraction form
   31,155.12/42,992.24 = 17,005.12/x
3. Step 3: Cross multiply
   31,155.12x = 42,992.24 × 17,005.12
4. Step 4: Simplify right side
   31,155.12x = 731,088,200.27
5. Step 5: Solve for x
   x = 731,088,200.27/31,155.12
6. Step 6: Final answer
   x = 23,466.07