Finding the Fourth Proportional to 5,216.45, 7,199.42 and 2,978.53

Step by Step Solution

1. Step 1: Write the proportion equation
   5,216.45 : 7,199.42 = 2,978.53 : x
2. Step 2: Convert to fraction form
   5,216.45/7,199.42 = 2,978.53/x
3. Step 3: Cross multiply
   5,216.45x = 7,199.42 × 2,978.53
4. Step 4: Simplify right side
   5,216.45x = 21,443,655.56
5. Step 5: Solve for x
   x = 21,443,655.56/5,216.45
6. Step 6: Final answer
   x = 4,110.78