Finding the Fourth Proportional to 19,689.17, 29,529.72 and 5,645.43

Step by Step Solution

1. Step 1: Write the proportion equation
   19,689.17 : 29,529.72 = 5,645.43 : x
2. Step 2: Convert to fraction form
   19,689.17/29,529.72 = 5,645.43/x
3. Step 3: Cross multiply
   19,689.17x = 29,529.72 × 5,645.43
4. Step 4: Simplify right side
   19,689.17x = 166,707,967.18
5. Step 5: Solve for x
   x = 166,707,967.18/19,689.17
6. Step 6: Final answer
   x = 8,466.99