Finding the Fourth Proportional to 82,486.07, 123,507.67 and 42,960.15

Step by Step Solution

1. Step 1: Write the proportion equation
   82,486.07 : 123,507.67 = 42,960.15 : x
2. Step 2: Convert to fraction form
   82,486.07/123,507.67 = 42,960.15/x
3. Step 3: Cross multiply
   82,486.07x = 123,507.67 × 42,960.15
4. Step 4: Simplify right side
   82,486.07x = 5,305,908,029.35
5. Step 5: Solve for x
   x = 5,305,908,029.35/82,486.07
6. Step 6: Final answer
   x = 64,324.90