Finding the Fourth Proportional to 12,422.96, 17,142.60 and 7,117.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,422.96 : 17,142.60 = 7,117.52 : x
2. Step 2: Convert to fraction form
   12,422.96/17,142.60 = 7,117.52/x
3. Step 3: Cross multiply
   12,422.96x = 17,142.60 × 7,117.52
4. Step 4: Simplify right side
   12,422.96x = 122,012,798.35
5. Step 5: Solve for x
   x = 122,012,798.35/12,422.96
6. Step 6: Final answer
   x = 9,821.56