Finding the Fourth Proportional to 9,978.39, 13,770.29 and 5,502.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.39 : 13,770.29 = 5,502.31 : x
2. Step 2: Convert to fraction form
   9,978.39/13,770.29 = 5,502.31/x
3. Step 3: Cross multiply
   9,978.39x = 13,770.29 × 5,502.31
4. Step 4: Simplify right side
   9,978.39x = 75,768,383.70
5. Step 5: Solve for x
   x = 75,768,383.70/9,978.39
6. Step 6: Final answer
   x = 7,593.25