Finding the Fourth Proportional to 31,156.86, 42,996.78 and 17,009.94

Step by Step Solution

1. Step 1: Write the proportion equation
   31,156.86 : 42,996.78 = 17,009.94 : x
2. Step 2: Convert to fraction form
   31,156.86/42,996.78 = 17,009.94/x
3. Step 3: Cross multiply
   31,156.86x = 42,996.78 × 17,009.94
4. Step 4: Simplify right side
   31,156.86x = 731,372,647.99
5. Step 5: Solve for x
   x = 731,372,647.99/31,156.86
6. Step 6: Final answer
   x = 23,473.89