Finding the Fourth Proportional to 3,985.50, 5,979.47 and 2,877.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,985.50 : 5,979.47 = 2,877.42 : x
2. Step 2: Convert to fraction form
   3,985.50/5,979.47 = 2,877.42/x
3. Step 3: Cross multiply
   3,985.50x = 5,979.47 × 2,877.42
4. Step 4: Simplify right side
   3,985.50x = 17,205,446.57
5. Step 5: Solve for x
   x = 17,205,446.57/3,985.50
6. Step 6: Final answer
   x = 4,317.01