Finding the Fourth Proportional to 12,522.78, 17,283.70 and 7,146

Step by Step Solution

1. Step 1: Write the proportion equation
   12,522.78 : 17,283.70 = 7,146 : x
2. Step 2: Convert to fraction form
   12,522.78/17,283.70 = 7,146/x
3. Step 3: Cross multiply
   12,522.78x = 17,283.70 × 7,146
4. Step 4: Simplify right side
   12,522.78x = 123,509,320.20
5. Step 5: Solve for x
   x = 123,509,320.20/12,522.78
6. Step 6: Final answer
   x = 9,862.77