Finding the Fourth Proportional to 22,205.48, 30,657.15 and 21,139.83

Step by Step Solution

1. Step 1: Write the proportion equation
   22,205.48 : 30,657.15 = 21,139.83 : x
2. Step 2: Convert to fraction form
   22,205.48/30,657.15 = 21,139.83/x
3. Step 3: Cross multiply
   22,205.48x = 30,657.15 × 21,139.83
4. Step 4: Simplify right side
   22,205.48x = 648,086,939.28
5. Step 5: Solve for x
   x = 648,086,939.28/22,205.48
6. Step 6: Final answer
   x = 29,185.91