Finding the Fourth Proportional to 31,036.29, 42,827.12 and 17,421.21

Step by Step Solution

1. Step 1: Write the proportion equation
   31,036.29 : 42,827.12 = 17,421.21 : x
2. Step 2: Convert to fraction form
   31,036.29/42,827.12 = 17,421.21/x
3. Step 3: Cross multiply
   31,036.29x = 42,827.12 × 17,421.21
4. Step 4: Simplify right side
   31,036.29x = 746,100,403.42
5. Step 5: Solve for x
   x = 746,100,403.42/31,036.29
6. Step 6: Final answer
   x = 24,039.61