Finding the Fourth Proportional to 1,431.39, 1,975.30 and 801.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.39 : 1,975.30 = 801.92 : x
2. Step 2: Convert to fraction form
   1,431.39/1,975.30 = 801.92/x
3. Step 3: Cross multiply
   1,431.39x = 1,975.30 × 801.92
4. Step 4: Simplify right side
   1,431.39x = 1,584,030.57
5. Step 5: Solve for x
   x = 1,584,030.57/1,431.39
6. Step 6: Final answer
   x = 1,106.64