Finding the Fourth Proportional to 31,120.73, 42,932.72 and 19,179.71

Step by Step Solution

1. Step 1: Write the proportion equation
   31,120.73 : 42,932.72 = 19,179.71 : x
2. Step 2: Convert to fraction form
   31,120.73/42,932.72 = 19,179.71/x
3. Step 3: Cross multiply
   31,120.73x = 42,932.72 × 19,179.71
4. Step 4: Simplify right side
   31,120.73x = 823,437,023.21
5. Step 5: Solve for x
   x = 823,437,023.21/31,120.73
6. Step 6: Final answer
   x = 26,459.44