Finding the Fourth Proportional to 21,109.68, 29,128.41 and 17,935.83

Step by Step Solution

1. Step 1: Write the proportion equation
   21,109.68 : 29,128.41 = 17,935.83 : x
2. Step 2: Convert to fraction form
   21,109.68/29,128.41 = 17,935.83/x
3. Step 3: Cross multiply
   21,109.68x = 29,128.41 × 17,935.83
4. Step 4: Simplify right side
   21,109.68x = 522,442,209.93
5. Step 5: Solve for x
   x = 522,442,209.93/21,109.68
6. Step 6: Final answer
   x = 24,748.94