Finding the Fourth Proportional to 1,430.65, 1,974.41 and 801.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,430.65 : 1,974.41 = 801.31 : x
2. Step 2: Convert to fraction form
   1,430.65/1,974.41 = 801.31/x
3. Step 3: Cross multiply
   1,430.65x = 1,974.41 × 801.31
4. Step 4: Simplify right side
   1,430.65x = 1,582,114.48
5. Step 5: Solve for x
   x = 1,582,114.48/1,430.65
6. Step 6: Final answer
   x = 1,105.87