Finding the Fourth Proportional to 9,219.90, 12,723.42 and 5,028.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,219.90 : 12,723.42 = 5,028.15 : x
2. Step 2: Convert to fraction form
   9,219.90/12,723.42 = 5,028.15/x
3. Step 3: Cross multiply
   9,219.90x = 12,723.42 × 5,028.15
4. Step 4: Simplify right side
   9,219.90x = 63,975,264.27
5. Step 5: Solve for x
   x = 63,975,264.27/9,219.90
6. Step 6: Final answer
   x = 6,938.82