Finding the Fourth Proportional to 2,400.31, 3,312.43 and 1,296.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,400.31 : 3,312.43 = 1,296.31 : x
2. Step 2: Convert to fraction form
   2,400.31/3,312.43 = 1,296.31/x
3. Step 3: Cross multiply
   2,400.31x = 3,312.43 × 1,296.31
4. Step 4: Simplify right side
   2,400.31x = 4,293,946.03
5. Step 5: Solve for x
   x = 4,293,946.03/2,400.31
6. Step 6: Final answer
   x = 1,788.91