Finding the Fourth Proportional to 21,426.69, 32,127.72 and 11,419.11

Step by Step Solution

1. Step 1: Write the proportion equation
   21,426.69 : 32,127.72 = 11,419.11 : x
2. Step 2: Convert to fraction form
   21,426.69/32,127.72 = 11,419.11/x
3. Step 3: Cross multiply
   21,426.69x = 32,127.72 × 11,419.11
4. Step 4: Simplify right side
   21,426.69x = 366,869,925.91
5. Step 5: Solve for x
   x = 366,869,925.91/21,426.69
6. Step 6: Final answer
   x = 17,122.10