Finding the Fourth Proportional to 65,456.72, 98,188.60 and 21,080.24

Step by Step Solution

1. Step 1: Write the proportion equation
   65,456.72 : 98,188.60 = 21,080.24 : x
2. Step 2: Convert to fraction form
   65,456.72/98,188.60 = 21,080.24/x
3. Step 3: Cross multiply
   65,456.72x = 98,188.60 × 21,080.24
4. Step 4: Simplify right side
   65,456.72x = 2,069,839,253.26
5. Step 5: Solve for x
   x = 2,069,839,253.26/65,456.72
6. Step 6: Final answer
   x = 31,621.49