Finding the Fourth Proportional to 12,680.82, 19,021.32 and 3,915.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,680.82 : 19,021.32 = 3,915.54 : x
2. Step 2: Convert to fraction form
   12,680.82/19,021.32 = 3,915.54/x
3. Step 3: Cross multiply
   12,680.82x = 19,021.32 × 3,915.54
4. Step 4: Simplify right side
   12,680.82x = 74,478,739.31
5. Step 5: Solve for x
   x = 74,478,739.31/12,680.82
6. Step 6: Final answer
   x = 5,873.34