Finding the Fourth Proportional to 8,111.64, 12,156.86 and 4,159.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.64 : 12,156.86 = 4,159.55 : x
2. Step 2: Convert to fraction form
   8,111.64/12,156.86 = 4,159.55/x
3. Step 3: Cross multiply
   8,111.64x = 12,156.86 × 4,159.55
4. Step 4: Simplify right side
   8,111.64x = 50,566,985.43
5. Step 5: Solve for x
   x = 50,566,985.43/8,111.64
6. Step 6: Final answer
   x = 6,233.88