Finding the Fourth Proportional to 22,188.62, 30,617.76 and 12,760.22

Step by Step Solution

1. Step 1: Write the proportion equation
   22,188.62 : 30,617.76 = 12,760.22 : x
2. Step 2: Convert to fraction form
   22,188.62/30,617.76 = 12,760.22/x
3. Step 3: Cross multiply
   22,188.62x = 30,617.76 × 12,760.22
4. Step 4: Simplify right side
   22,188.62x = 390,689,353.51
5. Step 5: Solve for x
   x = 390,689,353.51/22,188.62
6. Step 6: Final answer
   x = 17,607.65