Finding the Fourth Proportional to 65,454.72, 98,185.60 and 21,078.24

Step by Step Solution

1. Step 1: Write the proportion equation
   65,454.72 : 98,185.60 = 21,078.24 : x
2. Step 2: Convert to fraction form
   65,454.72/98,185.60 = 21,078.24/x
3. Step 3: Cross multiply
   65,454.72x = 98,185.60 × 21,078.24
4. Step 4: Simplify right side
   65,454.72x = 2,069,579,641.34
5. Step 5: Solve for x
   x = 2,069,579,641.34/65,454.72
6. Step 6: Final answer
   x = 31,618.49