Finding the Fourth Proportional to 8,740.78, 12,061.80 and 4,963.86

Step by Step Solution

1. Step 1: Write the proportion equation
   8,740.78 : 12,061.80 = 4,963.86 : x
2. Step 2: Convert to fraction form
   8,740.78/12,061.80 = 4,963.86/x
3. Step 3: Cross multiply
   8,740.78x = 12,061.80 × 4,963.86
4. Step 4: Simplify right side
   8,740.78x = 59,873,086.55
5. Step 5: Solve for x
   x = 59,873,086.55/8,740.78
6. Step 6: Final answer
   x = 6,849.86