Finding the Fourth Proportional to 1,390.52, 1,919.00 and 801.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,390.52 : 1,919.00 = 801.07 : x
2. Step 2: Convert to fraction form
   1,390.52/1,919.00 = 801.07/x
3. Step 3: Cross multiply
   1,390.52x = 1,919.00 × 801.07
4. Step 4: Simplify right side
   1,390.52x = 1,537,250.54
5. Step 5: Solve for x
   x = 1,537,250.54/1,390.52
6. Step 6: Final answer
   x = 1,105.52