Finding the Fourth Proportional to 7,105.61, 10,637.15 and 5,126.78

Step by Step Solution

1. Step 1: Write the proportion equation
   7,105.61 : 10,637.15 = 5,126.78 : x
2. Step 2: Convert to fraction form
   7,105.61/10,637.15 = 5,126.78/x
3. Step 3: Cross multiply
   7,105.61x = 10,637.15 × 5,126.78
4. Step 4: Simplify right side
   7,105.61x = 54,534,249.06
5. Step 5: Solve for x
   x = 54,534,249.06/7,105.61
6. Step 6: Final answer
   x = 7,674.82