Finding the Fourth Proportional to 8,705.13, 12,019.31 and 5,352.45

Step by Step Solution

1. Step 1: Write the proportion equation
   8,705.13 : 12,019.31 = 5,352.45 : x
2. Step 2: Convert to fraction form
   8,705.13/12,019.31 = 5,352.45/x
3. Step 3: Cross multiply
   8,705.13x = 12,019.31 × 5,352.45
4. Step 4: Simplify right side
   8,705.13x = 64,332,755.81
5. Step 5: Solve for x
   x = 64,332,755.81/8,705.13
6. Step 6: Final answer
   x = 7,390.21