Finding the Fourth Proportional to 1,393.35, 1,922.59 and 803.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.35 : 1,922.59 = 803.76 : x
2. Step 2: Convert to fraction form
   1,393.35/1,922.59 = 803.76/x
3. Step 3: Cross multiply
   1,393.35x = 1,922.59 × 803.76
4. Step 4: Simplify right side
   1,393.35x = 1,545,300.94
5. Step 5: Solve for x
   x = 1,545,300.94/1,393.35
6. Step 6: Final answer
   x = 1,109.05