Finding the Fourth Proportional to 12,018.75, 16,578.59 and 7,763.01

Step by Step Solution

1. Step 1: Write the proportion equation
   12,018.75 : 16,578.59 = 7,763.01 : x
2. Step 2: Convert to fraction form
   12,018.75/16,578.59 = 7,763.01/x
3. Step 3: Cross multiply
   12,018.75x = 16,578.59 × 7,763.01
4. Step 4: Simplify right side
   12,018.75x = 128,699,721.14
5. Step 5: Solve for x
   x = 128,699,721.14/12,018.75
6. Step 6: Final answer
   x = 10,708.25