Finding the Fourth Proportional to 8,429.67, 11,622.15 and 5,772.51

Step by Step Solution

1. Step 1: Write the proportion equation
   8,429.67 : 11,622.15 = 5,772.51 : x
2. Step 2: Convert to fraction form
   8,429.67/11,622.15 = 5,772.51/x
3. Step 3: Cross multiply
   8,429.67x = 11,622.15 × 5,772.51
4. Step 4: Simplify right side
   8,429.67x = 67,088,977.10
5. Step 5: Solve for x
   x = 67,088,977.10/8,429.67
6. Step 6: Final answer
   x = 7,958.67