Finding the Fourth Proportional to 31,064.72, 42,872.29 and 19,135.04

Step by Step Solution

1. Step 1: Write the proportion equation
   31,064.72 : 42,872.29 = 19,135.04 : x
2. Step 2: Convert to fraction form
   31,064.72/42,872.29 = 19,135.04/x
3. Step 3: Cross multiply
   31,064.72x = 42,872.29 × 19,135.04
4. Step 4: Simplify right side
   31,064.72x = 820,362,721.84
5. Step 5: Solve for x
   x = 820,362,721.84/31,064.72
6. Step 6: Final answer
   x = 26,408.18