Finding the Fourth Proportional to 2,312.10, 3,190.72 and 1,264.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,312.10 : 3,190.72 = 1,264.14 : x
2. Step 2: Convert to fraction form
   2,312.10/3,190.72 = 1,264.14/x
3. Step 3: Cross multiply
   2,312.10x = 3,190.72 × 1,264.14
4. Step 4: Simplify right side
   2,312.10x = 4,033,516.78
5. Step 5: Solve for x
   x = 4,033,516.78/2,312.10
6. Step 6: Final answer
   x = 1,744.53