Finding the Fourth Proportional to 82,115.10, 123,176.70 and 42,749.10

Step by Step Solution

1. Step 1: Write the proportion equation
   82,115.10 : 123,176.70 = 42,749.10 : x
2. Step 2: Convert to fraction form
   82,115.10/123,176.70 = 42,749.10/x
3. Step 3: Cross multiply
   82,115.10x = 123,176.70 × 42,749.10
4. Step 4: Simplify right side
   82,115.10x = 5,265,693,065.97
5. Step 5: Solve for x
   x = 5,265,693,065.97/82,115.10
6. Step 6: Final answer
   x = 64,125.76