Finding the Fourth Proportional to 2,400.72, 3,314.10 and 1,405.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,400.72 : 3,314.10 = 1,405.86 : x
2. Step 2: Convert to fraction form
   2,400.72/3,314.10 = 1,405.86/x
3. Step 3: Cross multiply
   2,400.72x = 3,314.10 × 1,405.86
4. Step 4: Simplify right side
   2,400.72x = 4,659,160.63
5. Step 5: Solve for x
   x = 4,659,160.63/2,400.72
6. Step 6: Final answer
   x = 1,940.73