Finding the Fourth Proportional to 7,978.55, 10,998.99 and 5,613.35

Step by Step Solution

1. Step 1: Write the proportion equation
   7,978.55 : 10,998.99 = 5,613.35 : x
2. Step 2: Convert to fraction form
   7,978.55/10,998.99 = 5,613.35/x
3. Step 3: Cross multiply
   7,978.55x = 10,998.99 × 5,613.35
4. Step 4: Simplify right side
   7,978.55x = 61,741,180.52
5. Step 5: Solve for x
   x = 61,741,180.52/7,978.55
6. Step 6: Final answer
   x = 7,738.40