Finding the Fourth Proportional to 22,109.21, 30,505.76 and 12,677.76

Step by Step Solution

1. Step 1: Write the proportion equation
   22,109.21 : 30,505.76 = 12,677.76 : x
2. Step 2: Convert to fraction form
   22,109.21/30,505.76 = 12,677.76/x
3. Step 3: Cross multiply
   22,109.21x = 30,505.76 × 12,677.76
4. Step 4: Simplify right side
   22,109.21x = 386,744,640.51
5. Step 5: Solve for x
   x = 386,744,640.51/22,109.21
6. Step 6: Final answer
   x = 17,492.47