Finding the Fourth Proportional to 65,624.72, 98,373.69 and 21,221.33

Step by Step Solution

1. Step 1: Write the proportion equation
   65,624.72 : 98,373.69 = 21,221.33 : x
2. Step 2: Convert to fraction form
   65,624.72/98,373.69 = 21,221.33/x
3. Step 3: Cross multiply
   65,624.72x = 98,373.69 × 21,221.33
4. Step 4: Simplify right side
   65,624.72x = 2,087,620,046.94
5. Step 5: Solve for x
   x = 2,087,620,046.94/65,624.72
6. Step 6: Final answer
   x = 31,811.49