Finding the Fourth Proportional to 9,978.68, 13,769.66 and 5,501.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.68 : 13,769.66 = 5,501.31 : x
2. Step 2: Convert to fraction form
   9,978.68/13,769.66 = 5,501.31/x
3. Step 3: Cross multiply
   9,978.68x = 13,769.66 × 5,501.31
4. Step 4: Simplify right side
   9,978.68x = 75,751,168.25
5. Step 5: Solve for x
   x = 75,751,168.25/9,978.68
6. Step 6: Final answer
   x = 7,591.30