Finding the Fourth Proportional to 5,649.30, 7,798.76 and 3,972.16

Step by Step Solution

1. Step 1: Write the proportion equation
   5,649.30 : 7,798.76 = 3,972.16 : x
2. Step 2: Convert to fraction form
   5,649.30/7,798.76 = 3,972.16/x
3. Step 3: Cross multiply
   5,649.30x = 7,798.76 × 3,972.16
4. Step 4: Simplify right side
   5,649.30x = 30,977,922.52
5. Step 5: Solve for x
   x = 30,977,922.52/5,649.30
6. Step 6: Final answer
   x = 5,483.50