Finding the Fourth Proportional to 31,105.29, 42,917.61 and 19,002.66

Step by Step Solution

1. Step 1: Write the proportion equation
   31,105.29 : 42,917.61 = 19,002.66 : x
2. Step 2: Convert to fraction form
   31,105.29/42,917.61 = 19,002.66/x
3. Step 3: Cross multiply
   31,105.29x = 42,917.61 × 19,002.66
4. Step 4: Simplify right side
   31,105.29x = 815,548,750.84
5. Step 5: Solve for x
   x = 815,548,750.84/31,105.29
6. Step 6: Final answer
   x = 26,218.97