Finding the Fourth Proportional to 9,740.72, 13,443.36 and 5,549.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,740.72 : 13,443.36 = 5,549.78 : x
2. Step 2: Convert to fraction form
   9,740.72/13,443.36 = 5,549.78/x
3. Step 3: Cross multiply
   9,740.72x = 13,443.36 × 5,549.78
4. Step 4: Simplify right side
   9,740.72x = 74,607,690.46
5. Step 5: Solve for x
   x = 74,607,690.46/9,740.72
6. Step 6: Final answer
   x = 7,659.36