Finding the Fourth Proportional to 31,068.41, 42,874.39 and 16,921.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,068.41 : 42,874.39 = 16,921.25 : x
2. Step 2: Convert to fraction form
   31,068.41/42,874.39 = 16,921.25/x
3. Step 3: Cross multiply
   31,068.41x = 42,874.39 × 16,921.25
4. Step 4: Simplify right side
   31,068.41x = 725,488,239.35
5. Step 5: Solve for x
   x = 725,488,239.35/31,068.41
6. Step 6: Final answer
   x = 23,351.32