Finding the Fourth Proportional to 10,018.12, 15,028.80 and 3,091

Step by Step Solution

1. Step 1: Write the proportion equation
   10,018.12 : 15,028.80 = 3,091 : x
2. Step 2: Convert to fraction form
   10,018.12/15,028.80 = 3,091/x
3. Step 3: Cross multiply
   10,018.12x = 15,028.80 × 3,091
4. Step 4: Simplify right side
   10,018.12x = 46,454,020.80
5. Step 5: Solve for x
   x = 46,454,020.80/10,018.12
6. Step 6: Final answer
   x = 4,637.00