Finding the Fourth Proportional to 9,862.72, 13,600.32 and 7,972.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,862.72 : 13,600.32 = 7,972.48 : x
2. Step 2: Convert to fraction form
   9,862.72/13,600.32 = 7,972.48/x
3. Step 3: Cross multiply
   9,862.72x = 13,600.32 × 7,972.48
4. Step 4: Simplify right side
   9,862.72x = 108,428,279.19
5. Step 5: Solve for x
   x = 108,428,279.19/9,862.72
6. Step 6: Final answer
   x = 10,993.75