Finding the Fourth Proportional to 9,172.56, 12,657.33 and 5,343.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,172.56 : 12,657.33 = 5,343.60 : x
2. Step 2: Convert to fraction form
   9,172.56/12,657.33 = 5,343.60/x
3. Step 3: Cross multiply
   9,172.56x = 12,657.33 × 5,343.60
4. Step 4: Simplify right side
   9,172.56x = 67,635,708.59
5. Step 5: Solve for x
   x = 67,635,708.59/9,172.56
6. Step 6: Final answer
   x = 7,373.70