Finding the Fourth Proportional to 1,353.21, 1,867.42 and 763.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.21 : 1,867.42 = 763.73 : x
2. Step 2: Convert to fraction form
   1,353.21/1,867.42 = 763.73/x
3. Step 3: Cross multiply
   1,353.21x = 1,867.42 × 763.73
4. Step 4: Simplify right side
   1,353.21x = 1,426,204.68
5. Step 5: Solve for x
   x = 1,426,204.68/1,353.21
6. Step 6: Final answer
   x = 1,053.94