Finding the Fourth Proportional to 82,283.72, 123,400.26 and 42,819.30

Step by Step Solution

1. Step 1: Write the proportion equation
   82,283.72 : 123,400.26 = 42,819.30 : x
2. Step 2: Convert to fraction form
   82,283.72/123,400.26 = 42,819.30/x
3. Step 3: Cross multiply
   82,283.72x = 123,400.26 × 42,819.30
4. Step 4: Simplify right side
   82,283.72x = 5,283,912,753.02
5. Step 5: Solve for x
   x = 5,283,912,753.02/82,283.72
6. Step 6: Final answer
   x = 64,215.78