Finding the Fourth Proportional to 2,307.31, 3,183.80 and 1,312.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,307.31 : 3,183.80 = 1,312.42 : x
2. Step 2: Convert to fraction form
   2,307.31/3,183.80 = 1,312.42/x
3. Step 3: Cross multiply
   2,307.31x = 3,183.80 × 1,312.42
4. Step 4: Simplify right side
   2,307.31x = 4,178,482.80
5. Step 5: Solve for x
   x = 4,178,482.80/2,307.31
6. Step 6: Final answer
   x = 1,810.98