Finding the Fourth Proportional to 2,407.12, 3,613.78 and 1,312.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,407.12 : 3,613.78 = 1,312.23 : x
2. Step 2: Convert to fraction form
   2,407.12/3,613.78 = 1,312.23/x
3. Step 3: Cross multiply
   2,407.12x = 3,613.78 × 1,312.23
4. Step 4: Simplify right side
   2,407.12x = 4,742,125.72
5. Step 5: Solve for x
   x = 4,742,125.72/2,407.12
6. Step 6: Final answer
   x = 1,970.04