Finding the Fourth Proportional to 7,152.88, 9,870.58 and 3,966.07

Step by Step Solution

1. Step 1: Write the proportion equation
   7,152.88 : 9,870.58 = 3,966.07 : x
2. Step 2: Convert to fraction form
   7,152.88/9,870.58 = 3,966.07/x
3. Step 3: Cross multiply
   7,152.88x = 9,870.58 × 3,966.07
4. Step 4: Simplify right side
   7,152.88x = 39,147,411.22
5. Step 5: Solve for x
   x = 39,147,411.22/7,152.88
6. Step 6: Final answer
   x = 5,472.96