Finding the Fourth Proportional to 82,763.30, 124,404.15 and 81,208.10

Step by Step Solution

1. Step 1: Write the proportion equation
   82,763.30 : 124,404.15 = 81,208.10 : x
2. Step 2: Convert to fraction form
   82,763.30/124,404.15 = 81,208.10/x
3. Step 3: Cross multiply
   82,763.30x = 124,404.15 × 81,208.10
4. Step 4: Simplify right side
   82,763.30x = 10,102,624,653.62
5. Step 5: Solve for x
   x = 10,102,624,653.62/82,763.30
6. Step 6: Final answer
   x = 122,066.48