Finding the Fourth Proportional to 12,522.78, 18,784.78 and 10,327.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,522.78 : 18,784.78 = 10,327.50 : x
2. Step 2: Convert to fraction form
   12,522.78/18,784.78 = 10,327.50/x
3. Step 3: Cross multiply
   12,522.78x = 18,784.78 × 10,327.50
4. Step 4: Simplify right side
   12,522.78x = 193,999,815.45
5. Step 5: Solve for x
   x = 193,999,815.45/12,522.78
6. Step 6: Final answer
   x = 15,491.75