Finding the Fourth Proportional to 8,109.95, 12,156.64 and 5,150.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,109.95 : 12,156.64 = 5,150.56 : x
2. Step 2: Convert to fraction form
   8,109.95/12,156.64 = 5,150.56/x
3. Step 3: Cross multiply
   8,109.95x = 12,156.64 × 5,150.56
4. Step 4: Simplify right side
   8,109.95x = 62,613,476.72
5. Step 5: Solve for x
   x = 62,613,476.72/8,109.95
6. Step 6: Final answer
   x = 7,720.57