Finding the Fourth Proportional to 52,792.78, 79,188.50 and 12,812.09

Step by Step Solution

1. Step 1: Write the proportion equation
   52,792.78 : 79,188.50 = 12,812.09 : x
2. Step 2: Convert to fraction form
   52,792.78/79,188.50 = 12,812.09/x
3. Step 3: Cross multiply
   52,792.78x = 79,188.50 × 12,812.09
4. Step 4: Simplify right side
   52,792.78x = 1,014,570,336.00
5. Step 5: Solve for x
   x = 1,014,570,336.00/52,792.78
6. Step 6: Final answer
   x = 19,217.98