Finding the Fourth Proportional to 8,178.72, 12,262.56 and 2,630.40

Step by Step Solution

1. Step 1: Write the proportion equation
   8,178.72 : 12,262.56 = 2,630.40 : x
2. Step 2: Convert to fraction form
   8,178.72/12,262.56 = 2,630.40/x
3. Step 3: Cross multiply
   8,178.72x = 12,262.56 × 2,630.40
4. Step 4: Simplify right side
   8,178.72x = 32,255,437.82
5. Step 5: Solve for x
   x = 32,255,437.82/8,178.72
6. Step 6: Final answer
   x = 3,943.82