Finding the Fourth Proportional to 51,890.39, 71,610.50 and 30,687.83

Step by Step Solution

1. Step 1: Write the proportion equation
   51,890.39 : 71,610.50 = 30,687.83 : x
2. Step 2: Convert to fraction form
   51,890.39/71,610.50 = 30,687.83/x
3. Step 3: Cross multiply
   51,890.39x = 71,610.50 × 30,687.83
4. Step 4: Simplify right side
   51,890.39x = 2,197,570,696.78
5. Step 5: Solve for x
   x = 2,197,570,696.78/51,890.39
6. Step 6: Final answer
   x = 42,350.24