Finding the Fourth Proportional to 82,767.30, 124,410.15 and 81,212.10

Step by Step Solution

1. Step 1: Write the proportion equation
   82,767.30 : 124,410.15 = 81,212.10 : x
2. Step 2: Convert to fraction form
   82,767.30/124,410.15 = 81,212.10/x
3. Step 3: Cross multiply
   82,767.30x = 124,410.15 × 81,212.10
4. Step 4: Simplify right side
   82,767.30x = 10,103,609,542.82
5. Step 5: Solve for x
   x = 10,103,609,542.82/82,767.30
6. Step 6: Final answer
   x = 122,072.48