Finding the Fourth Proportional to 5,158.53, 7,738.78 and 2,196.91

Step by Step Solution

1. Step 1: Write the proportion equation
   5,158.53 : 7,738.78 = 2,196.91 : x
2. Step 2: Convert to fraction form
   5,158.53/7,738.78 = 2,196.91/x
3. Step 3: Cross multiply
   5,158.53x = 7,738.78 × 2,196.91
4. Step 4: Simplify right side
   5,158.53x = 17,001,403.17
5. Step 5: Solve for x
   x = 17,001,403.17/5,158.53
6. Step 6: Final answer
   x = 3,295.78