Finding the Fourth Proportional to 81,808.84, 122,698.86 and 21,838.06

Step by Step Solution

1. Step 1: Write the proportion equation
   81,808.84 : 122,698.86 = 21,838.06 : x
2. Step 2: Convert to fraction form
   81,808.84/122,698.86 = 21,838.06/x
3. Step 3: Cross multiply
   81,808.84x = 122,698.86 × 21,838.06
4. Step 4: Simplify right side
   81,808.84x = 2,679,505,066.61
5. Step 5: Solve for x
   x = 2,679,505,066.61/81,808.84
6. Step 6: Final answer
   x = 32,753.25