Finding the Fourth Proportional to 9,978.59, 13,770.28 and 5,502.33

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.59 : 13,770.28 = 5,502.33 : x
2. Step 2: Convert to fraction form
   9,978.59/13,770.28 = 5,502.33/x
3. Step 3: Cross multiply
   9,978.59x = 13,770.28 × 5,502.33
4. Step 4: Simplify right side
   9,978.59x = 75,768,624.75
5. Step 5: Solve for x
   x = 75,768,624.75/9,978.59
6. Step 6: Final answer
   x = 7,593.12