Finding the Fourth Proportional to 9,978.51, 13,770.45 and 5,502.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.51 : 13,770.45 = 5,502.42 : x
2. Step 2: Convert to fraction form
   9,978.51/13,770.45 = 5,502.42/x
3. Step 3: Cross multiply
   9,978.51x = 13,770.45 × 5,502.42
4. Step 4: Simplify right side
   9,978.51x = 75,770,799.49
5. Step 5: Solve for x
   x = 75,770,799.49/9,978.51
6. Step 6: Final answer
   x = 7,593.40