Finding the Fourth Proportional to 8,598.24, 12,898.08 and 3,978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,598.24 : 12,898.08 = 3,978.72 : x
2. Step 2: Convert to fraction form
   8,598.24/12,898.08 = 3,978.72/x
3. Step 3: Cross multiply
   8,598.24x = 12,898.08 × 3,978.72
4. Step 4: Simplify right side
   8,598.24x = 51,317,848.86
5. Step 5: Solve for x
   x = 51,317,848.86/8,598.24
6. Step 6: Final answer
   x = 5,968.41