Finding the Fourth Proportional to 31,070.72, 46,597.92 and 21,208.16

Step by Step Solution

1. Step 1: Write the proportion equation
   31,070.72 : 46,597.92 = 21,208.16 : x
2. Step 2: Convert to fraction form
   31,070.72/46,597.92 = 21,208.16/x
3. Step 3: Cross multiply
   31,070.72x = 46,597.92 × 21,208.16
4. Step 4: Simplify right side
   31,070.72x = 988,256,143.03
5. Step 5: Solve for x
   x = 988,256,143.03/31,070.72
6. Step 6: Final answer
   x = 31,806.67