Finding the Fourth Proportional to 82,811.82, 124,219.78 and 30,221.30

Step by Step Solution

1. Step 1: Write the proportion equation
   82,811.82 : 124,219.78 = 30,221.30 : x
2. Step 2: Convert to fraction form
   82,811.82/124,219.78 = 30,221.30/x
3. Step 3: Cross multiply
   82,811.82x = 124,219.78 × 30,221.30
4. Step 4: Simplify right side
   82,811.82x = 3,754,083,237.31
5. Step 5: Solve for x
   x = 3,754,083,237.31/82,811.82
6. Step 6: Final answer
   x = 45,332.70