Finding the Fourth Proportional to 31,835.07, 43,945.86 and 21,489.06

Step by Step Solution

1. Step 1: Write the proportion equation
   31,835.07 : 43,945.86 = 21,489.06 : x
2. Step 2: Convert to fraction form
   31,835.07/43,945.86 = 21,489.06/x
3. Step 3: Cross multiply
   31,835.07x = 43,945.86 × 21,489.06
4. Step 4: Simplify right side
   31,835.07x = 944,355,222.29
5. Step 5: Solve for x
   x = 944,355,222.29/31,835.07
6. Step 6: Final answer
   x = 29,663.99