Finding the Fourth Proportional to 9,612.29, 13,264.98 and 5,420.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,612.29 : 13,264.98 = 5,420.54 : x
2. Step 2: Convert to fraction form
   9,612.29/13,264.98 = 5,420.54/x
3. Step 3: Cross multiply
   9,612.29x = 13,264.98 × 5,420.54
4. Step 4: Simplify right side
   9,612.29x = 71,903,354.69
5. Step 5: Solve for x
   x = 71,903,354.69/9,612.29
6. Step 6: Final answer
   x = 7,480.36