Finding the Fourth Proportional to 2,374.40, 3,276.78 and 1,312.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,374.40 : 3,276.78 = 1,312.28 : x
2. Step 2: Convert to fraction form
   2,374.40/3,276.78 = 1,312.28/x
3. Step 3: Cross multiply
   2,374.40x = 3,276.78 × 1,312.28
4. Step 4: Simplify right side
   2,374.40x = 4,300,052.86
5. Step 5: Solve for x
   x = 4,300,052.86/2,374.40
6. Step 6: Final answer
   x = 1,811.01