Finding the Fourth Proportional to 31,842.72, 43,912.53 and 21,656.16

Step by Step Solution

1. Step 1: Write the proportion equation
   31,842.72 : 43,912.53 = 21,656.16 : x
2. Step 2: Convert to fraction form
   31,842.72/43,912.53 = 21,656.16/x
3. Step 3: Cross multiply
   31,842.72x = 43,912.53 × 21,656.16
4. Step 4: Simplify right side
   31,842.72x = 950,976,775.68
5. Step 5: Solve for x
   x = 950,976,775.68/31,842.72
6. Step 6: Final answer
   x = 29,864.81