Finding the Fourth Proportional to 2,470.15, 3,407.83 and 1,421.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,470.15 : 3,407.83 = 1,421.65 : x
2. Step 2: Convert to fraction form
   2,470.15/3,407.83 = 1,421.65/x
3. Step 3: Cross multiply
   2,470.15x = 3,407.83 × 1,421.65
4. Step 4: Simplify right side
   2,470.15x = 4,844,741.52
5. Step 5: Solve for x
   x = 4,844,741.52/2,470.15
6. Step 6: Final answer
   x = 1,961.31