Finding the Fourth Proportional to 9,134.56, 12,606.05 and 5,155.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,134.56 : 12,606.05 = 5,155.81 : x
2. Step 2: Convert to fraction form
   9,134.56/12,606.05 = 5,155.81/x
3. Step 3: Cross multiply
   9,134.56x = 12,606.05 × 5,155.81
4. Step 4: Simplify right side
   9,134.56x = 64,994,398.65
5. Step 5: Solve for x
   x = 64,994,398.65/9,134.56
6. Step 6: Final answer
   x = 7,115.22