Finding the Fourth Proportional to 31,139.46, 42,965.91 and 19,804.83

Step by Step Solution

1. Step 1: Write the proportion equation
   31,139.46 : 42,965.91 = 19,804.83 : x
2. Step 2: Convert to fraction form
   31,139.46/42,965.91 = 19,804.83/x
3. Step 3: Cross multiply
   31,139.46x = 42,965.91 × 19,804.83
4. Step 4: Simplify right side
   31,139.46x = 850,932,543.35
5. Step 5: Solve for x
   x = 850,932,543.35/31,139.46
6. Step 6: Final answer
   x = 27,326.50