Finding the Fourth Proportional to 1,393.17, 1,922.61 and 763.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.17 : 1,922.61 = 763.71 : x
2. Step 2: Convert to fraction form
   1,393.17/1,922.61 = 763.71/x
3. Step 3: Cross multiply
   1,393.17x = 1,922.61 × 763.71
4. Step 4: Simplify right side
   1,393.17x = 1,468,316.48
5. Step 5: Solve for x
   x = 1,468,316.48/1,393.17
6. Step 6: Final answer
   x = 1,053.94