Finding the Fourth Proportional to 2,118.38, 3,175.67 and 1,077.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.38 : 3,175.67 = 1,077.80 : x
2. Step 2: Convert to fraction form
   2,118.38/3,175.67 = 1,077.80/x
3. Step 3: Cross multiply
   2,118.38x = 3,175.67 × 1,077.80
4. Step 4: Simplify right side
   2,118.38x = 3,422,715.86
5. Step 5: Solve for x
   x = 3,422,715.86/2,118.38
6. Step 6: Final answer
   x = 1,615.73