Finding the Fourth Proportional to 8,934.78, 12,330.56 and 5,158.63

Step by Step Solution

1. Step 1: Write the proportion equation
   8,934.78 : 12,330.56 = 5,158.63 : x
2. Step 2: Convert to fraction form
   8,934.78/12,330.56 = 5,158.63/x
3. Step 3: Cross multiply
   8,934.78x = 12,330.56 × 5,158.63
4. Step 4: Simplify right side
   8,934.78x = 63,608,796.73
5. Step 5: Solve for x
   x = 63,608,796.73/8,934.78
6. Step 6: Final answer
   x = 7,119.24