Finding the Fourth Proportional to 31,101.27, 42,920.63 and 19,003.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,101.27 : 42,920.63 = 19,003.72 : x
2. Step 2: Convert to fraction form
   31,101.27/42,920.63 = 19,003.72/x
3. Step 3: Cross multiply
   31,101.27x = 42,920.63 × 19,003.72
4. Step 4: Simplify right side
   31,101.27x = 815,651,634.74
5. Step 5: Solve for x
   x = 815,651,634.74/31,101.27
6. Step 6: Final answer
   x = 26,225.67