Finding the Fourth Proportional to 12,705.10, 19,057.77 and 5,206.73

Step by Step Solution

1. Step 1: Write the proportion equation
   12,705.10 : 19,057.77 = 5,206.73 : x
2. Step 2: Convert to fraction form
   12,705.10/19,057.77 = 5,206.73/x
3. Step 3: Cross multiply
   12,705.10x = 19,057.77 × 5,206.73
4. Step 4: Simplify right side
   12,705.10x = 99,228,667.38
5. Step 5: Solve for x
   x = 99,228,667.38/12,705.10
6. Step 6: Final answer
   x = 7,810.15