Finding the Fourth Proportional to 65,990.30, 99,003.87 and 21,648.24

Step by Step Solution

1. Step 1: Write the proportion equation
   65,990.30 : 99,003.87 = 21,648.24 : x
2. Step 2: Convert to fraction form
   65,990.30/99,003.87 = 21,648.24/x
3. Step 3: Cross multiply
   65,990.30x = 99,003.87 × 21,648.24
4. Step 4: Simplify right side
   65,990.30x = 2,143,259,538.69
5. Step 5: Solve for x
   x = 2,143,259,538.69/65,990.30
6. Step 6: Final answer
   x = 32,478.41