Finding the Fourth Proportional to 9,395.31, 12,959.28 and 7,152.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,395.31 : 12,959.28 = 7,152.15 : x
2. Step 2: Convert to fraction form
   9,395.31/12,959.28 = 7,152.15/x
3. Step 3: Cross multiply
   9,395.31x = 12,959.28 × 7,152.15
4. Step 4: Simplify right side
   9,395.31x = 92,686,714.45
5. Step 5: Solve for x
   x = 92,686,714.45/9,395.31
6. Step 6: Final answer
   x = 9,865.21