Finding the Fourth Proportional to 2,878.53, 3,970.89 and 1,934.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,878.53 : 3,970.89 = 1,934.55 : x
2. Step 2: Convert to fraction form
   2,878.53/3,970.89 = 1,934.55/x
3. Step 3: Cross multiply
   2,878.53x = 3,970.89 × 1,934.55
4. Step 4: Simplify right side
   2,878.53x = 7,681,885.25
5. Step 5: Solve for x
   x = 7,681,885.25/2,878.53
6. Step 6: Final answer
   x = 2,668.68