Finding the Fourth Proportional to 31,153.94, 42,992.43 and 17,006.78

Step by Step Solution

1. Step 1: Write the proportion equation
   31,153.94 : 42,992.43 = 17,006.78 : x
2. Step 2: Convert to fraction form
   31,153.94/42,992.43 = 17,006.78/x
3. Step 3: Cross multiply
   31,153.94x = 42,992.43 × 17,006.78
4. Step 4: Simplify right side
   31,153.94x = 731,162,842.38
5. Step 5: Solve for x
   x = 731,162,842.38/31,153.94
6. Step 6: Final answer
   x = 23,469.35