Finding the Fourth Proportional to 1,890.42, 2,606.88 and 1,260.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,890.42 : 2,606.88 = 1,260.96 : x
2. Step 2: Convert to fraction form
   1,890.42/2,606.88 = 1,260.96/x
3. Step 3: Cross multiply
   1,890.42x = 2,606.88 × 1,260.96
4. Step 4: Simplify right side
   1,890.42x = 3,287,171.40
5. Step 5: Solve for x
   x = 3,287,171.40/1,890.42
6. Step 6: Final answer
   x = 1,738.86