Finding the Fourth Proportional to 1,431.45, 1,975.23 and 801.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.45 : 1,975.23 = 801.89 : x
2. Step 2: Convert to fraction form
   1,431.45/1,975.23 = 801.89/x
3. Step 3: Cross multiply
   1,431.45x = 1,975.23 × 801.89
4. Step 4: Simplify right side
   1,431.45x = 1,583,907.31
5. Step 5: Solve for x
   x = 1,583,907.31/1,431.45
6. Step 6: Final answer
   x = 1,106.51