Finding the Fourth Proportional to 4,885.88, 6,740.91 and 3,118.05

Step by Step Solution

1. Step 1: Write the proportion equation
   4,885.88 : 6,740.91 = 3,118.05 : x
2. Step 2: Convert to fraction form
   4,885.88/6,740.91 = 3,118.05/x
3. Step 3: Cross multiply
   4,885.88x = 6,740.91 × 3,118.05
4. Step 4: Simplify right side
   4,885.88x = 21,018,494.43
5. Step 5: Solve for x
   x = 21,018,494.43/4,885.88
6. Step 6: Final answer
   x = 4,301.89