Finding the Fourth Proportional to 1,431.02, 1,974.98 and 801.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.02 : 1,974.98 = 801.72 : x
2. Step 2: Convert to fraction form
   1,431.02/1,974.98 = 801.72/x
3. Step 3: Cross multiply
   1,431.02x = 1,974.98 × 801.72
4. Step 4: Simplify right side
   1,431.02x = 1,583,376.96
5. Step 5: Solve for x
   x = 1,583,376.96/1,431.02
6. Step 6: Final answer
   x = 1,106.47