Finding the Fourth Proportional to 8,913.06, 12,301.37 and 5,136.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,913.06 : 12,301.37 = 5,136.78 : x
2. Step 2: Convert to fraction form
   8,913.06/12,301.37 = 5,136.78/x
3. Step 3: Cross multiply
   8,913.06x = 12,301.37 × 5,136.78
4. Step 4: Simplify right side
   8,913.06x = 63,189,471.10
5. Step 5: Solve for x
   x = 63,189,471.10/8,913.06
6. Step 6: Final answer
   x = 7,089.54