Finding the Fourth Proportional to 9,000.27, 12,415.20 and 5,412.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,000.27 : 12,415.20 = 5,412.75 : x
2. Step 2: Convert to fraction form
   9,000.27/12,415.20 = 5,412.75/x
3. Step 3: Cross multiply
   9,000.27x = 12,415.20 × 5,412.75
4. Step 4: Simplify right side
   9,000.27x = 67,200,373.80
5. Step 5: Solve for x
   x = 67,200,373.80/9,000.27
6. Step 6: Final answer
   x = 7,466.48