Finding the Fourth Proportional to 9,630.61, 13,288.90 and 5,381.13

Step by Step Solution

1. Step 1: Write the proportion equation
   9,630.61 : 13,288.90 = 5,381.13 : x
2. Step 2: Convert to fraction form
   9,630.61/13,288.90 = 5,381.13/x
3. Step 3: Cross multiply
   9,630.61x = 13,288.90 × 5,381.13
4. Step 4: Simplify right side
   9,630.61x = 71,509,298.46
5. Step 5: Solve for x
   x = 71,509,298.46/9,630.61
6. Step 6: Final answer
   x = 7,425.21