Finding the Fourth Proportional to 9,978.31, 13,770.04 and 5,502.13

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.31 : 13,770.04 = 5,502.13 : x
2. Step 2: Convert to fraction form
   9,978.31/13,770.04 = 5,502.13/x
3. Step 3: Cross multiply
   9,978.31x = 13,770.04 × 5,502.13
4. Step 4: Simplify right side
   9,978.31x = 75,764,550.19
5. Step 5: Solve for x
   x = 75,764,550.19/9,978.31
6. Step 6: Final answer
   x = 7,592.92