Finding the Fourth Proportional to 12,078.94, 18,111.93 and 5,506.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,078.94 : 18,111.93 = 5,506.60 : x
2. Step 2: Convert to fraction form
   12,078.94/18,111.93 = 5,506.60/x
3. Step 3: Cross multiply
   12,078.94x = 18,111.93 × 5,506.60
4. Step 4: Simplify right side
   12,078.94x = 99,735,153.74
5. Step 5: Solve for x
   x = 99,735,153.74/12,078.94
6. Step 6: Final answer
   x = 8,256.95