Finding the Fourth Proportional to 9,978.24, 14,972.76 and 4,138.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.24 : 14,972.76 = 4,138.86 : x
2. Step 2: Convert to fraction form
   9,978.24/14,972.76 = 4,138.86/x
3. Step 3: Cross multiply
   9,978.24x = 14,972.76 × 4,138.86
4. Step 4: Simplify right side
   9,978.24x = 61,970,157.45
5. Step 5: Solve for x
   x = 61,970,157.45/9,978.24
6. Step 6: Final answer
   x = 6,210.53