Finding the Fourth Proportional to 8,123.50, 12,185.86 and 4,612.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,123.50 : 12,185.86 = 4,612.15 : x
2. Step 2: Convert to fraction form
   8,123.50/12,185.86 = 4,612.15/x
3. Step 3: Cross multiply
   8,123.50x = 12,185.86 × 4,612.15
4. Step 4: Simplify right side
   8,123.50x = 56,203,014.20
5. Step 5: Solve for x
   x = 56,203,014.20/8,123.50
6. Step 6: Final answer
   x = 6,918.57