Finding the Fourth Proportional to 2,359.99, 3,256.78 and 1,312.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,359.99 : 3,256.78 = 1,312.05 : x
2. Step 2: Convert to fraction form
   2,359.99/3,256.78 = 1,312.05/x
3. Step 3: Cross multiply
   2,359.99x = 3,256.78 × 1,312.05
4. Step 4: Simplify right side
   2,359.99x = 4,273,058.20
5. Step 5: Solve for x
   x = 4,273,058.20/2,359.99
6. Step 6: Final answer
   x = 1,810.63