Finding the Fourth Proportional to 8,912.08, 12,298.72 and 5,186.08

Step by Step Solution

1. Step 1: Write the proportion equation
   8,912.08 : 12,298.72 = 5,186.08 : x
2. Step 2: Convert to fraction form
   8,912.08/12,298.72 = 5,186.08/x
3. Step 3: Cross multiply
   8,912.08x = 12,298.72 × 5,186.08
4. Step 4: Simplify right side
   8,912.08x = 63,782,145.82
5. Step 5: Solve for x
   x = 63,782,145.82/8,912.08
6. Step 6: Final answer
   x = 7,156.82