Finding the Fourth Proportional to 12,018.74, 16,582.54 and 7,772.29

Step by Step Solution

1. Step 1: Write the proportion equation
   12,018.74 : 16,582.54 = 7,772.29 : x
2. Step 2: Convert to fraction form
   12,018.74/16,582.54 = 7,772.29/x
3. Step 3: Cross multiply
   12,018.74x = 16,582.54 × 7,772.29
4. Step 4: Simplify right side
   12,018.74x = 128,884,270.33
5. Step 5: Solve for x
   x = 128,884,270.33/12,018.74
6. Step 6: Final answer
   x = 10,723.61