Finding the Fourth Proportional to 65,401.21, 98,081.70 and 21,016.05

Step by Step Solution

1. Step 1: Write the proportion equation
   65,401.21 : 98,081.70 = 21,016.05 : x
2. Step 2: Convert to fraction form
   65,401.21/98,081.70 = 21,016.05/x
3. Step 3: Cross multiply
   65,401.21x = 98,081.70 × 21,016.05
4. Step 4: Simplify right side
   65,401.21x = 2,061,289,911.29
5. Step 5: Solve for x
   x = 2,061,289,911.29/65,401.21
6. Step 6: Final answer
   x = 31,517.61