Finding the Fourth Proportional to 13,078.92, 18,051.30 and 7,776.76

Step by Step Solution

1. Step 1: Write the proportion equation
   13,078.92 : 18,051.30 = 7,776.76 : x
2. Step 2: Convert to fraction form
   13,078.92/18,051.30 = 7,776.76/x
3. Step 3: Cross multiply
   13,078.92x = 18,051.30 × 7,776.76
4. Step 4: Simplify right side
   13,078.92x = 140,380,627.79
5. Step 5: Solve for x
   x = 140,380,627.79/13,078.92
6. Step 6: Final answer
   x = 10,733.35