Finding the Fourth Proportional to 12,855.90, 19,261.83 and 7,016.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,855.90 : 19,261.83 = 7,016.61 : x
2. Step 2: Convert to fraction form
   12,855.90/19,261.83 = 7,016.61/x
3. Step 3: Cross multiply
   12,855.90x = 19,261.83 × 7,016.61
4. Step 4: Simplify right side
   12,855.90x = 135,152,749.00
5. Step 5: Solve for x
   x = 135,152,749.00/12,855.90
6. Step 6: Final answer
   x = 10,512.90