Finding the Fourth Proportional to 8,981.78, 12,395.55 and 5,206.16

Step by Step Solution

1. Step 1: Write the proportion equation
   8,981.78 : 12,395.55 = 5,206.16 : x
2. Step 2: Convert to fraction form
   8,981.78/12,395.55 = 5,206.16/x
3. Step 3: Cross multiply
   8,981.78x = 12,395.55 × 5,206.16
4. Step 4: Simplify right side
   8,981.78x = 64,533,216.59
5. Step 5: Solve for x
   x = 64,533,216.59/8,981.78
6. Step 6: Final answer
   x = 7,184.90