Finding the Fourth Proportional to 15,638.11, 21,580.62 and 8,468.10

Step by Step Solution

1. Step 1: Write the proportion equation
   15,638.11 : 21,580.62 = 8,468.10 : x
2. Step 2: Convert to fraction form
   15,638.11/21,580.62 = 8,468.10/x
3. Step 3: Cross multiply
   15,638.11x = 21,580.62 × 8,468.10
4. Step 4: Simplify right side
   15,638.11x = 182,746,848.22
5. Step 5: Solve for x
   x = 182,746,848.22/15,638.11
6. Step 6: Final answer
   x = 11,685.99