Finding the Fourth Proportional to 12,085.88, 18,115.71 and 4,688.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,085.88 : 18,115.71 = 4,688.15 : x
2. Step 2: Convert to fraction form
   12,085.88/18,115.71 = 4,688.15/x
3. Step 3: Cross multiply
   12,085.88x = 18,115.71 × 4,688.15
4. Step 4: Simplify right side
   12,085.88x = 84,929,165.84
5. Step 5: Solve for x
   x = 84,929,165.84/12,085.88
6. Step 6: Final answer
   x = 7,027.14