Finding the Fourth Proportional to 81,099, 121,647.96 and 21,940.74

Step by Step Solution

1. Step 1: Write the proportion equation
   81,099 : 121,647.96 = 21,940.74 : x
2. Step 2: Convert to fraction form
   81,099/121,647.96 = 21,940.74/x
3. Step 3: Cross multiply
   81,099x = 121,647.96 × 21,940.74
4. Step 4: Simplify right side
   81,099x = 2,669,046,261.89
5. Step 5: Solve for x
   x = 2,669,046,261.89/81,099
6. Step 6: Final answer
   x = 32,910.96