Finding the Fourth Proportional to 1,376.16, 2,063.31 and 760.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.16 : 2,063.31 = 760.15 : x
2. Step 2: Convert to fraction form
   1,376.16/2,063.31 = 760.15/x
3. Step 3: Cross multiply
   1,376.16x = 2,063.31 × 760.15
4. Step 4: Simplify right side
   1,376.16x = 1,568,425.10
5. Step 5: Solve for x
   x = 1,568,425.10/1,376.16
6. Step 6: Final answer
   x = 1,139.71