Finding the Fourth Proportional to 2,612.20, 3,914.74 and 1,314.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612.20 : 3,914.74 = 1,314.56 : x
2. Step 2: Convert to fraction form
   2,612.20/3,914.74 = 1,314.56/x
3. Step 3: Cross multiply
   2,612.20x = 3,914.74 × 1,314.56
4. Step 4: Simplify right side
   2,612.20x = 5,146,160.61
5. Step 5: Solve for x
   x = 5,146,160.61/2,612.20
6. Step 6: Final answer
   x = 1,970.05