Finding the Fourth Proportional to 1,392.71, 1,922.00 and 803.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.71 : 1,922.00 = 803.30 : x
2. Step 2: Convert to fraction form
   1,392.71/1,922.00 = 803.30/x
3. Step 3: Cross multiply
   1,392.71x = 1,922.00 × 803.30
4. Step 4: Simplify right side
   1,392.71x = 1,543,938.58
5. Step 5: Solve for x
   x = 1,543,938.58/1,392.71
6. Step 6: Final answer
   x = 1,108.59