Finding the Fourth Proportional to 13,078.10, 18,049.29 and 7,772.87

Step by Step Solution

1. Step 1: Write the proportion equation
   13,078.10 : 18,049.29 = 7,772.87 : x
2. Step 2: Convert to fraction form
   13,078.10/18,049.29 = 7,772.87/x
3. Step 3: Cross multiply
   13,078.10x = 18,049.29 × 7,772.87
4. Step 4: Simplify right side
   13,078.10x = 140,294,784.76
5. Step 5: Solve for x
   x = 140,294,784.76/13,078.10
6. Step 6: Final answer
   x = 10,727.46