Finding the Fourth Proportional to 8,112.44, 12,211.72 and 5,788.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,112.44 : 12,211.72 = 5,788.55 : x
2. Step 2: Convert to fraction form
   8,112.44/12,211.72 = 5,788.55/x
3. Step 3: Cross multiply
   8,112.44x = 12,211.72 × 5,788.55
4. Step 4: Simplify right side
   8,112.44x = 70,688,151.81
5. Step 5: Solve for x
   x = 70,688,151.81/8,112.44
6. Step 6: Final answer
   x = 8,713.55