Finding the Fourth Proportional to 9,978.95, 13,771.04 and 5,502.58

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.95 : 13,771.04 = 5,502.58 : x
2. Step 2: Convert to fraction form
   9,978.95/13,771.04 = 5,502.58/x
3. Step 3: Cross multiply
   9,978.95x = 13,771.04 × 5,502.58
4. Step 4: Simplify right side
   9,978.95x = 75,776,280.28
5. Step 5: Solve for x
   x = 75,776,280.28/9,978.95
6. Step 6: Final answer
   x = 7,593.61