Finding the Fourth Proportional to 12,062.10, 18,109.35 and 7,698.90

Step by Step Solution

1. Step 1: Write the proportion equation
   12,062.10 : 18,109.35 = 7,698.90 : x
2. Step 2: Convert to fraction form
   12,062.10/18,109.35 = 7,698.90/x
3. Step 3: Cross multiply
   12,062.10x = 18,109.35 × 7,698.90
4. Step 4: Simplify right side
   12,062.10x = 139,422,074.72
5. Step 5: Solve for x
   x = 139,422,074.72/12,062.10
6. Step 6: Final answer
   x = 11,558.69