Finding the Fourth Proportional to 8,048.10, 12,086.55 and 7,788.90

Step by Step Solution

1. Step 1: Write the proportion equation
   8,048.10 : 12,086.55 = 7,788.90 : x
2. Step 2: Convert to fraction form
   8,048.10/12,086.55 = 7,788.90/x
3. Step 3: Cross multiply
   8,048.10x = 12,086.55 × 7,788.90
4. Step 4: Simplify right side
   8,048.10x = 94,140,929.30
5. Step 5: Solve for x
   x = 94,140,929.30/8,048.10
6. Step 6: Final answer
   x = 11,697.29