Finding the Fourth Proportional to 82,271.10, 123,410.70 and 42,905.10

Step by Step Solution

1. Step 1: Write the proportion equation
   82,271.10 : 123,410.70 = 42,905.10 : x
2. Step 2: Convert to fraction form
   82,271.10/123,410.70 = 42,905.10/x
3. Step 3: Cross multiply
   82,271.10x = 123,410.70 × 42,905.10
4. Step 4: Simplify right side
   82,271.10x = 5,294,948,424.57
5. Step 5: Solve for x
   x = 5,294,948,424.57/82,271.10
6. Step 6: Final answer
   x = 64,359.76