Finding the Fourth Proportional to 1,353.17, 1,867.47 and 763.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.17 : 1,867.47 = 763.76 : x
2. Step 2: Convert to fraction form
   1,353.17/1,867.47 = 763.76/x
3. Step 3: Cross multiply
   1,353.17x = 1,867.47 × 763.76
4. Step 4: Simplify right side
   1,353.17x = 1,426,298.89
5. Step 5: Solve for x
   x = 1,426,298.89/1,353.17
6. Step 6: Final answer
   x = 1,054.04