Finding the Fourth Proportional to 31,072.29, 42,878.34 and 17,641.68

Step by Step Solution

1. Step 1: Write the proportion equation
   31,072.29 : 42,878.34 = 17,641.68 : x
2. Step 2: Convert to fraction form
   31,072.29/42,878.34 = 17,641.68/x
3. Step 3: Cross multiply
   31,072.29x = 42,878.34 × 17,641.68
4. Step 4: Simplify right side
   31,072.29x = 756,445,953.21
5. Step 5: Solve for x
   x = 756,445,953.21/31,072.29
6. Step 6: Final answer
   x = 24,344.71