Finding the Fourth Proportional to 7,219.13, 10,830.71 and 2,778.82

Step by Step Solution

1. Step 1: Write the proportion equation
   7,219.13 : 10,830.71 = 2,778.82 : x
2. Step 2: Convert to fraction form
   7,219.13/10,830.71 = 2,778.82/x
3. Step 3: Cross multiply
   7,219.13x = 10,830.71 × 2,778.82
4. Step 4: Simplify right side
   7,219.13x = 30,096,573.43
5. Step 5: Solve for x
   x = 30,096,573.43/7,219.13
6. Step 6: Final answer
   x = 4,169.01