Finding the Fourth Proportional to 2,118.93, 3,176.51 and 1,078.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.93 : 3,176.51 = 1,078.35 : x
2. Step 2: Convert to fraction form
   2,118.93/3,176.51 = 1,078.35/x
3. Step 3: Cross multiply
   2,118.93x = 3,176.51 × 1,078.35
4. Step 4: Simplify right side
   2,118.93x = 3,425,384.17
5. Step 5: Solve for x
   x = 3,425,384.17/2,118.93
6. Step 6: Final answer
   x = 1,616.56