Finding the Fourth Proportional to 42,070.17, 63,129.38 and 17,105.61

Step by Step Solution

1. Step 1: Write the proportion equation
   42,070.17 : 63,129.38 = 17,105.61 : x
2. Step 2: Convert to fraction form
   42,070.17/63,129.38 = 17,105.61/x
3. Step 3: Cross multiply
   42,070.17x = 63,129.38 × 17,105.61
4. Step 4: Simplify right side
   42,070.17x = 1,079,866,468.29
5. Step 5: Solve for x
   x = 1,079,866,468.29/42,070.17
6. Step 6: Final answer
   x = 25,668.22