Finding the Fourth Proportional to 31,120.50, 46,662.90 and 21,271.98

Step by Step Solution

1. Step 1: Write the proportion equation
   31,120.50 : 46,662.90 = 21,271.98 : x
2. Step 2: Convert to fraction form
   31,120.50/46,662.90 = 21,271.98/x
3. Step 3: Cross multiply
   31,120.50x = 46,662.90 × 21,271.98
4. Step 4: Simplify right side
   31,120.50x = 992,612,275.54
5. Step 5: Solve for x
   x = 992,612,275.54/31,120.50
6. Step 6: Final answer
   x = 31,895.77