Finding the Fourth Proportional to 1,902.72, 2,626.47 and 1,431.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,902.72 : 2,626.47 = 1,431.99 : x
2. Step 2: Convert to fraction form
   1,902.72/2,626.47 = 1,431.99/x
3. Step 3: Cross multiply
   1,902.72x = 2,626.47 × 1,431.99
4. Step 4: Simplify right side
   1,902.72x = 3,761,074.30
5. Step 5: Solve for x
   x = 3,761,074.30/1,902.72
6. Step 6: Final answer
   x = 1,976.68