Finding the Fourth Proportional to 12,103.90, 18,146.84 and 5,085.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,103.90 : 18,146.84 = 5,085.96 : x
2. Step 2: Convert to fraction form
   12,103.90/18,146.84 = 5,085.96/x
3. Step 3: Cross multiply
   12,103.90x = 18,146.84 × 5,085.96
4. Step 4: Simplify right side
   12,103.90x = 92,294,102.37
5. Step 5: Solve for x
   x = 92,294,102.37/12,103.90
6. Step 6: Final answer
   x = 7,625.15