Finding the Fourth Proportional to 2,658.83, 3,990.29 and 1,877.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,658.83 : 3,990.29 = 1,877.15 : x
2. Step 2: Convert to fraction form
   2,658.83/3,990.29 = 1,877.15/x
3. Step 3: Cross multiply
   2,658.83x = 3,990.29 × 1,877.15
4. Step 4: Simplify right side
   2,658.83x = 7,490,373.46
5. Step 5: Solve for x
   x = 7,490,373.46/2,658.83
6. Step 6: Final answer
   x = 2,817.17