Finding the Fourth Proportional to 31,122.72, 46,618.42 and 21,133.59

Step by Step Solution

1. Step 1: Write the proportion equation
   31,122.72 : 46,618.42 = 21,133.59 : x
2. Step 2: Convert to fraction form
   31,122.72/46,618.42 = 21,133.59/x
3. Step 3: Cross multiply
   31,122.72x = 46,618.42 × 21,133.59
4. Step 4: Simplify right side
   31,122.72x = 985,214,574.73
5. Step 5: Solve for x
   x = 985,214,574.73/31,122.72
6. Step 6: Final answer
   x = 31,655.80