Finding the Fourth Proportional to 12,528.80, 17,292 and 7,152

Step by Step Solution

1. Step 1: Write the proportion equation
   12,528.80 : 17,292 = 7,152 : x
2. Step 2: Convert to fraction form
   12,528.80/17,292 = 7,152/x
3. Step 3: Cross multiply
   12,528.80x = 17,292 × 7,152
4. Step 4: Simplify right side
   12,528.80x = 123,672,384
5. Step 5: Solve for x
   x = 123,672,384/12,528.80
6. Step 6: Final answer
   x = 9,871.05