Finding the Fourth Proportional to 31,852.78, 43,945.47 and 21,899.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,852.78 : 43,945.47 = 21,899.50 : x
2. Step 2: Convert to fraction form
   31,852.78/43,945.47 = 21,899.50/x
3. Step 3: Cross multiply
   31,852.78x = 43,945.47 × 21,899.50
4. Step 4: Simplify right side
   31,852.78x = 962,383,820.27
5. Step 5: Solve for x
   x = 962,383,820.27/31,852.78
6. Step 6: Final answer
   x = 30,213.50