Finding the Fourth Proportional to 9,148.56, 12,623.40 and 5,372.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,148.56 : 12,623.40 = 5,372.16 : x
2. Step 2: Convert to fraction form
   9,148.56/12,623.40 = 5,372.16/x
3. Step 3: Cross multiply
   9,148.56x = 12,623.40 × 5,372.16
4. Step 4: Simplify right side
   9,148.56x = 67,814,924.54
5. Step 5: Solve for x
   x = 67,814,924.54/9,148.56
6. Step 6: Final answer
   x = 7,412.63