Finding the Fourth Proportional to 9,172.16, 12,657.63 and 5,395.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,172.16 : 12,657.63 = 5,395.48 : x
2. Step 2: Convert to fraction form
   9,172.16/12,657.63 = 5,395.48/x
3. Step 3: Cross multiply
   9,172.16x = 12,657.63 × 5,395.48
4. Step 4: Simplify right side
   9,172.16x = 68,293,978.10
5. Step 5: Solve for x
   x = 68,293,978.10/9,172.16
6. Step 6: Final answer
   x = 7,445.79