Finding the Fourth Proportional to 31,069.08, 42,874.65 and 17,640.09

Step by Step Solution

1. Step 1: Write the proportion equation
   31,069.08 : 42,874.65 = 17,640.09 : x
2. Step 2: Convert to fraction form
   31,069.08/42,874.65 = 17,640.09/x
3. Step 3: Cross multiply
   31,069.08x = 42,874.65 × 17,640.09
4. Step 4: Simplify right side
   31,069.08x = 756,312,684.72
5. Step 5: Solve for x
   x = 756,312,684.72/31,069.08
6. Step 6: Final answer
   x = 24,342.94