Finding the Fourth Proportional to 1,392.52, 1,921.67 and 763.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.52 : 1,921.67 = 763.05 : x
2. Step 2: Convert to fraction form
   1,392.52/1,921.67 = 763.05/x
3. Step 3: Cross multiply
   1,392.52x = 1,921.67 × 763.05
4. Step 4: Simplify right side
   1,392.52x = 1,466,328.60
5. Step 5: Solve for x
   x = 1,466,328.60/1,392.52
6. Step 6: Final answer
   x = 1,053.00