Finding the Fourth Proportional to 22,117.17, 30,521.28 and 12,684.99

Step by Step Solution

1. Step 1: Write the proportion equation
   22,117.17 : 30,521.28 = 12,684.99 : x
2. Step 2: Convert to fraction form
   22,117.17/30,521.28 = 12,684.99/x
3. Step 3: Cross multiply
   22,117.17x = 30,521.28 × 12,684.99
4. Step 4: Simplify right side
   22,117.17x = 387,162,131.59
5. Step 5: Solve for x
   x = 387,162,131.59/22,117.17
6. Step 6: Final answer
   x = 17,505.05