Finding the Fourth Proportional to 1,890.71, 2,608.90 and 1,051.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,890.71 : 2,608.90 = 1,051.43 : x
2. Step 2: Convert to fraction form
   1,890.71/2,608.90 = 1,051.43/x
3. Step 3: Cross multiply
   1,890.71x = 2,608.90 × 1,051.43
4. Step 4: Simplify right side
   1,890.71x = 2,743,079.62
5. Step 5: Solve for x
   x = 2,743,079.62/1,890.71
6. Step 6: Final answer
   x = 1,450.82