Finding the Fourth Proportional to 9,172.06, 12,656.72 and 5,395.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,172.06 : 12,656.72 = 5,395.37 : x
2. Step 2: Convert to fraction form
   9,172.06/12,656.72 = 5,395.37/x
3. Step 3: Cross multiply
   9,172.06x = 12,656.72 × 5,395.37
4. Step 4: Simplify right side
   9,172.06x = 68,287,637.59
5. Step 5: Solve for x
   x = 68,287,637.59/9,172.06
6. Step 6: Final answer
   x = 7,445.18