Finding the Fourth Proportional to 2,310.71, 3,188.41 and 1,426.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,310.71 : 3,188.41 = 1,426.80 : x
2. Step 2: Convert to fraction form
   2,310.71/3,188.41 = 1,426.80/x
3. Step 3: Cross multiply
   2,310.71x = 3,188.41 × 1,426.80
4. Step 4: Simplify right side
   2,310.71x = 4,549,219.82
5. Step 5: Solve for x
   x = 4,549,219.82/2,310.71
6. Step 6: Final answer
   x = 1,968.75