Finding the Fourth Proportional to 1,393.34, 1,922.69 and 763.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.34 : 1,922.69 = 763.74 : x
2. Step 2: Convert to fraction form
   1,393.34/1,922.69 = 763.74/x
3. Step 3: Cross multiply
   1,393.34x = 1,922.69 × 763.74
4. Step 4: Simplify right side
   1,393.34x = 1,468,437.17
5. Step 5: Solve for x
   x = 1,468,437.17/1,393.34
6. Step 6: Final answer
   x = 1,053.90