Finding the Fourth Proportional to 12,486.42, 18,747.72 and 7,792.74

Step by Step Solution

1. Step 1: Write the proportion equation
   12,486.42 : 18,747.72 = 7,792.74 : x
2. Step 2: Convert to fraction form
   12,486.42/18,747.72 = 7,792.74/x
3. Step 3: Cross multiply
   12,486.42x = 18,747.72 × 7,792.74
4. Step 4: Simplify right side
   12,486.42x = 146,096,107.55
5. Step 5: Solve for x
   x = 146,096,107.55/12,486.42
6. Step 6: Final answer
   x = 11,700.40