Finding the Fourth Proportional to 9,072.72, 12,520.20 and 5,346

Step by Step Solution

1. Step 1: Write the proportion equation
   9,072.72 : 12,520.20 = 5,346 : x
2. Step 2: Convert to fraction form
   9,072.72/12,520.20 = 5,346/x
3. Step 3: Cross multiply
   9,072.72x = 12,520.20 × 5,346
4. Step 4: Simplify right side
   9,072.72x = 66,932,989.20
5. Step 5: Solve for x
   x = 66,932,989.20/9,072.72
6. Step 6: Final answer
   x = 7,377.39