Finding the Fourth Proportional to 12,968.78, 19,460.72 and 5,471.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,968.78 : 19,460.72 = 5,471.88 : x
2. Step 2: Convert to fraction form
   12,968.78/19,460.72 = 5,471.88/x
3. Step 3: Cross multiply
   12,968.78x = 19,460.72 × 5,471.88
4. Step 4: Simplify right side
   12,968.78x = 106,486,724.55
5. Step 5: Solve for x
   x = 106,486,724.55/12,968.78
6. Step 6: Final answer
   x = 8,211.01