Finding the Fourth Proportional to 17,112.78, 25,670.07 and 5,426.91

Step by Step Solution

1. Step 1: Write the proportion equation
   17,112.78 : 25,670.07 = 5,426.91 : x
2. Step 2: Convert to fraction form
   17,112.78/25,670.07 = 5,426.91/x
3. Step 3: Cross multiply
   17,112.78x = 25,670.07 × 5,426.91
4. Step 4: Simplify right side
   17,112.78x = 139,309,159.58
5. Step 5: Solve for x
   x = 139,309,159.58/17,112.78
6. Step 6: Final answer
   x = 8,140.65