Finding the Fourth Proportional to 9,978.58, 13,769.39 and 5,502.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.58 : 13,769.39 = 5,502.07 : x
2. Step 2: Convert to fraction form
   9,978.58/13,769.39 = 5,502.07/x
3. Step 3: Cross multiply
   9,978.58x = 13,769.39 × 5,502.07
4. Step 4: Simplify right side
   9,978.58x = 75,760,147.64
5. Step 5: Solve for x
   x = 75,760,147.64/9,978.58
6. Step 6: Final answer
   x = 7,592.28