Finding the Fourth Proportional to 1,353.18, 1,867.23 and 763.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.18 : 1,867.23 = 763.68 : x
2. Step 2: Convert to fraction form
   1,353.18/1,867.23 = 763.68/x
3. Step 3: Cross multiply
   1,353.18x = 1,867.23 × 763.68
4. Step 4: Simplify right side
   1,353.18x = 1,425,966.21
5. Step 5: Solve for x
   x = 1,425,966.21/1,353.18
6. Step 6: Final answer
   x = 1,053.79