Finding the Fourth Proportional to 1,251.58, 1,875.34 and 763.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,251.58 : 1,875.34 = 763.15 : x
2. Step 2: Convert to fraction form
   1,251.58/1,875.34 = 763.15/x
3. Step 3: Cross multiply
   1,251.58x = 1,875.34 × 763.15
4. Step 4: Simplify right side
   1,251.58x = 1,431,165.72
5. Step 5: Solve for x
   x = 1,431,165.72/1,251.58
6. Step 6: Final answer
   x = 1,143.49