Finding the Fourth Proportional to 1,353.30, 1,867.56 and 763.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.30 : 1,867.56 = 763.86 : x
2. Step 2: Convert to fraction form
   1,353.30/1,867.56 = 763.86/x
3. Step 3: Cross multiply
   1,353.30x = 1,867.56 × 763.86
4. Step 4: Simplify right side
   1,353.30x = 1,426,554.38
5. Step 5: Solve for x
   x = 1,426,554.38/1,353.30
6. Step 6: Final answer
   x = 1,054.13