Finding the Fourth Proportional to 65,618.61, 98,443.59 and 21,245.41

Step by Step Solution

1. Step 1: Write the proportion equation
   65,618.61 : 98,443.59 = 21,245.41 : x
2. Step 2: Convert to fraction form
   65,618.61/98,443.59 = 21,245.41/x
3. Step 3: Cross multiply
   65,618.61x = 98,443.59 × 21,245.41
4. Step 4: Simplify right side
   65,618.61x = 2,091,474,185.31
5. Step 5: Solve for x
   x = 2,091,474,185.31/65,618.61
6. Step 6: Final answer
   x = 31,873.19