Finding the Fourth Proportional to 9,978.42, 13,769.90 and 5,502.36

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.42 : 13,769.90 = 5,502.36 : x
2. Step 2: Convert to fraction form
   9,978.42/13,769.90 = 5,502.36/x
3. Step 3: Cross multiply
   9,978.42x = 13,769.90 × 5,502.36
4. Step 4: Simplify right side
   9,978.42x = 75,766,875.54
5. Step 5: Solve for x
   x = 75,766,875.54/9,978.42
6. Step 6: Final answer
   x = 7,593.08