Finding the Fourth Proportional to 31,003.20, 42,771.24 and 19,062.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,003.20 : 42,771.24 = 19,062.72 : x
2. Step 2: Convert to fraction form
   31,003.20/42,771.24 = 19,062.72/x
3. Step 3: Cross multiply
   31,003.20x = 42,771.24 × 19,062.72
4. Step 4: Simplify right side
   31,003.20x = 815,336,172.17
5. Step 5: Solve for x
   x = 815,336,172.17/31,003.20
6. Step 6: Final answer
   x = 26,298.45