Finding the Fourth Proportional to 8,705.56, 12,006.36 and 5,719.06

Step by Step Solution

1. Step 1: Write the proportion equation
   8,705.56 : 12,006.36 = 5,719.06 : x
2. Step 2: Convert to fraction form
   8,705.56/12,006.36 = 5,719.06/x
3. Step 3: Cross multiply
   8,705.56x = 12,006.36 × 5,719.06
4. Step 4: Simplify right side
   8,705.56x = 68,665,093.22
5. Step 5: Solve for x
   x = 68,665,093.22/8,705.56
6. Step 6: Final answer
   x = 7,887.50