Finding the Fourth Proportional to 12,680.01, 19,022.72 and 5,280.66

Step by Step Solution

1. Step 1: Write the proportion equation
   12,680.01 : 19,022.72 = 5,280.66 : x
2. Step 2: Convert to fraction form
   12,680.01/19,022.72 = 5,280.66/x
3. Step 3: Cross multiply
   12,680.01x = 19,022.72 × 5,280.66
4. Step 4: Simplify right side
   12,680.01x = 100,452,490.19
5. Step 5: Solve for x
   x = 100,452,490.19/12,680.01
6. Step 6: Final answer
   x = 7,922.11