Finding the Fourth Proportional to 31,128.98, 42,961.67 and 17,702.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,128.98 : 42,961.67 = 17,702.25 : x
2. Step 2: Convert to fraction form
   31,128.98/42,961.67 = 17,702.25/x
3. Step 3: Cross multiply
   31,128.98x = 42,961.67 × 17,702.25
4. Step 4: Simplify right side
   31,128.98x = 760,518,039.52
5. Step 5: Solve for x
   x = 760,518,039.52/31,128.98
6. Step 6: Final answer
   x = 24,431.19