Finding the Fourth Proportional to 5,404.16, 8,108.76 and 5,316.80

Step by Step Solution

1. Step 1: Write the proportion equation
   5,404.16 : 8,108.76 = 5,316.80 : x
2. Step 2: Convert to fraction form
   5,404.16/8,108.76 = 5,316.80/x
3. Step 3: Cross multiply
   5,404.16x = 8,108.76 × 5,316.80
4. Step 4: Simplify right side
   5,404.16x = 43,112,655.17
5. Step 5: Solve for x
   x = 43,112,655.17/5,404.16
6. Step 6: Final answer
   x = 7,977.68