Finding the Fourth Proportional to 31,060.32, 42,872.91 and 17,640.51

Step by Step Solution

1. Step 1: Write the proportion equation
   31,060.32 : 42,872.91 = 17,640.51 : x
2. Step 2: Convert to fraction form
   31,060.32/42,872.91 = 17,640.51/x
3. Step 3: Cross multiply
   31,060.32x = 42,872.91 × 17,640.51
4. Step 4: Simplify right side
   31,060.32x = 756,299,997.58
5. Step 5: Solve for x
   x = 756,299,997.58/31,060.32
6. Step 6: Final answer
   x = 24,349.39