Finding the Fourth Proportional to 31,116.24, 46,612.20 and 21,231

Step by Step Solution

1. Step 1: Write the proportion equation
   31,116.24 : 46,612.20 = 21,231 : x
2. Step 2: Convert to fraction form
   31,116.24/46,612.20 = 21,231/x
3. Step 3: Cross multiply
   31,116.24x = 46,612.20 × 21,231
4. Step 4: Simplify right side
   31,116.24x = 989,623,618.20
5. Step 5: Solve for x
   x = 989,623,618.20/31,116.24
6. Step 6: Final answer
   x = 31,804.09