Finding the Fourth Proportional to 81,061.98, 121,599.10 and 21,896.80

Step by Step Solution

1. Step 1: Write the proportion equation
   81,061.98 : 121,599.10 = 21,896.80 : x
2. Step 2: Convert to fraction form
   81,061.98/121,599.10 = 21,896.80/x
3. Step 3: Cross multiply
   81,061.98x = 121,599.10 × 21,896.80
4. Step 4: Simplify right side
   81,061.98x = 2,662,631,172.88
5. Step 5: Solve for x
   x = 2,662,631,172.88/81,061.98
6. Step 6: Final answer
   x = 32,846.86