Finding the Fourth Proportional to 2,073.40, 2,860.82 and 1,188.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,073.40 : 2,860.82 = 1,188.74 : x
2. Step 2: Convert to fraction form
   2,073.40/2,860.82 = 1,188.74/x
3. Step 3: Cross multiply
   2,073.40x = 2,860.82 × 1,188.74
4. Step 4: Simplify right side
   2,073.40x = 3,400,776.83
5. Step 5: Solve for x
   x = 3,400,776.83/2,073.40
6. Step 6: Final answer
   x = 1,640.20