Finding the Fourth Proportional to 12,654.72, 17,464.56 and 6,989.99

Step by Step Solution

1. Step 1: Write the proportion equation
   12,654.72 : 17,464.56 = 6,989.99 : x
2. Step 2: Convert to fraction form
   12,654.72/17,464.56 = 6,989.99/x
3. Step 3: Cross multiply
   12,654.72x = 17,464.56 × 6,989.99
4. Step 4: Simplify right side
   12,654.72x = 122,077,012.43
5. Step 5: Solve for x
   x = 122,077,012.43/12,654.72
6. Step 6: Final answer
   x = 9,646.76