Finding the Fourth Proportional to 31,091.72, 46,640.82 and 13,324.16

Step by Step Solution

1. Step 1: Write the proportion equation
   31,091.72 : 46,640.82 = 13,324.16 : x
2. Step 2: Convert to fraction form
   31,091.72/46,640.82 = 13,324.16/x
3. Step 3: Cross multiply
   31,091.72x = 46,640.82 × 13,324.16
4. Step 4: Simplify right side
   31,091.72x = 621,449,748.21
5. Step 5: Solve for x
   x = 621,449,748.21/31,091.72
6. Step 6: Final answer
   x = 19,987.63