Finding the Fourth Proportional to 1,391.00, 1,919.75 and 801.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,391.00 : 1,919.75 = 801.53 : x
2. Step 2: Convert to fraction form
   1,391.00/1,919.75 = 801.53/x
3. Step 3: Cross multiply
   1,391.00x = 1,919.75 × 801.53
4. Step 4: Simplify right side
   1,391.00x = 1,538,723.61
5. Step 5: Solve for x
   x = 1,538,723.61/1,391.00
6. Step 6: Final answer
   x = 1,106.20