Finding the Fourth Proportional to 12,686.16, 19,028.41 and 4,370.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,686.16 : 19,028.41 = 4,370.16 : x
2. Step 2: Convert to fraction form
   12,686.16/19,028.41 = 4,370.16/x
3. Step 3: Cross multiply
   12,686.16x = 19,028.41 × 4,370.16
4. Step 4: Simplify right side
   12,686.16x = 83,157,196.25
5. Step 5: Solve for x
   x = 83,157,196.25/12,686.16
6. Step 6: Final answer
   x = 6,554.95