Finding the Fourth Proportional to 1,890.03, 2,607.88 and 1,291.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,890.03 : 2,607.88 = 1,291.85 : x
2. Step 2: Convert to fraction form
   1,890.03/2,607.88 = 1,291.85/x
3. Step 3: Cross multiply
   1,890.03x = 2,607.88 × 1,291.85
4. Step 4: Simplify right side
   1,890.03x = 3,369,002.80
5. Step 5: Solve for x
   x = 3,369,002.80/1,890.03
6. Step 6: Final answer
   x = 1,782.51