Finding the Fourth Proportional to 12,956.78, 19,423.28 and 5,064.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,956.78 : 19,423.28 = 5,064.50 : x
2. Step 2: Convert to fraction form
   12,956.78/19,423.28 = 5,064.50/x
3. Step 3: Cross multiply
   12,956.78x = 19,423.28 × 5,064.50
4. Step 4: Simplify right side
   12,956.78x = 98,369,201.56
5. Step 5: Solve for x
   x = 98,369,201.56/12,956.78
6. Step 6: Final answer
   x = 7,592.10