Finding the Fourth Proportional to 1,890.72, 2,609.35 and 1,051.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,890.72 : 2,609.35 = 1,051.58 : x
2. Step 2: Convert to fraction form
   1,890.72/2,609.35 = 1,051.58/x
3. Step 3: Cross multiply
   1,890.72x = 2,609.35 × 1,051.58
4. Step 4: Simplify right side
   1,890.72x = 2,743,940.27
5. Step 5: Solve for x
   x = 2,743,940.27/1,890.72
6. Step 6: Final answer
   x = 1,451.27