Finding the Fourth Proportional to 30,538.86, 42,143.58 and 17,110.21

Step by Step Solution

1. Step 1: Write the proportion equation
   30,538.86 : 42,143.58 = 17,110.21 : x
2. Step 2: Convert to fraction form
   30,538.86/42,143.58 = 17,110.21/x
3. Step 3: Cross multiply
   30,538.86x = 42,143.58 × 17,110.21
4. Step 4: Simplify right side
   30,538.86x = 721,085,398.59
5. Step 5: Solve for x
   x = 721,085,398.59/30,538.86
6. Step 6: Final answer
   x = 23,612.06