Finding the Fourth Proportional to 9,978.19, 13,769.99 and 5,502.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.19 : 13,769.99 = 5,502.09 : x
2. Step 2: Convert to fraction form
   9,978.19/13,769.99 = 5,502.09/x
3. Step 3: Cross multiply
   9,978.19x = 13,769.99 × 5,502.09
4. Step 4: Simplify right side
   9,978.19x = 75,763,738.03
5. Step 5: Solve for x
   x = 75,763,738.03/9,978.19
6. Step 6: Final answer
   x = 7,592.94