Finding the Fourth Proportional to 9,134.78, 12,606.23 and 5,156.26

Step by Step Solution

1. Step 1: Write the proportion equation
   9,134.78 : 12,606.23 = 5,156.26 : x
2. Step 2: Convert to fraction form
   9,134.78/12,606.23 = 5,156.26/x
3. Step 3: Cross multiply
   9,134.78x = 12,606.23 × 5,156.26
4. Step 4: Simplify right side
   9,134.78x = 65,000,980.87
5. Step 5: Solve for x
   x = 65,000,980.87/9,134.78
6. Step 6: Final answer
   x = 7,115.77