Finding the Fourth Proportional to 5,291.52, 7,929.60 and 2,978.08

Step by Step Solution

1. Step 1: Write the proportion equation
   5,291.52 : 7,929.60 = 2,978.08 : x
2. Step 2: Convert to fraction form
   5,291.52/7,929.60 = 2,978.08/x
3. Step 3: Cross multiply
   5,291.52x = 7,929.60 × 2,978.08
4. Step 4: Simplify right side
   5,291.52x = 23,614,983.17
5. Step 5: Solve for x
   x = 23,614,983.17/5,291.52
6. Step 6: Final answer
   x = 4,462.80