Finding the Fourth Proportional to 5,085.88, 7,621.88 and 3,112.18

Step by Step Solution

1. Step 1: Write the proportion equation
   5,085.88 : 7,621.88 = 3,112.18 : x
2. Step 2: Convert to fraction form
   5,085.88/7,621.88 = 3,112.18/x
3. Step 3: Cross multiply
   5,085.88x = 7,621.88 × 3,112.18
4. Step 4: Simplify right side
   5,085.88x = 23,720,662.50
5. Step 5: Solve for x
   x = 23,720,662.50/5,085.88
6. Step 6: Final answer
   x = 4,664.02