Finding the Fourth Proportional to 12,460.27, 18,689.59 and 6,620.17

Step by Step Solution

1. Step 1: Write the proportion equation
   12,460.27 : 18,689.59 = 6,620.17 : x
2. Step 2: Convert to fraction form
   12,460.27/18,689.59 = 6,620.17/x
3. Step 3: Cross multiply
   12,460.27x = 18,689.59 × 6,620.17
4. Step 4: Simplify right side
   12,460.27x = 123,728,263.03
5. Step 5: Solve for x
   x = 123,728,263.03/12,460.27
6. Step 6: Final answer
   x = 9,929.82