Finding the Fourth Proportional to 8,911.95, 12,298.78 and 5,134.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,911.95 : 12,298.78 = 5,134.82 : x
2. Step 2: Convert to fraction form
   8,911.95/12,298.78 = 5,134.82/x
3. Step 3: Cross multiply
   8,911.95x = 12,298.78 × 5,134.82
4. Step 4: Simplify right side
   8,911.95x = 63,152,058.69
5. Step 5: Solve for x
   x = 63,152,058.69/8,911.95
6. Step 6: Final answer
   x = 7,086.22