Finding the Fourth Proportional to 3,714.12, 5,123.57 and 2,518.70

Step by Step Solution

1. Step 1: Write the proportion equation
   3,714.12 : 5,123.57 = 2,518.70 : x
2. Step 2: Convert to fraction form
   3,714.12/5,123.57 = 2,518.70/x
3. Step 3: Cross multiply
   3,714.12x = 5,123.57 × 2,518.70
4. Step 4: Simplify right side
   3,714.12x = 12,904,723.17
5. Step 5: Solve for x
   x = 12,904,723.17/3,714.12
6. Step 6: Final answer
   x = 3,474.50