Finding the Fourth Proportional to 82,274.10, 123,415.20 and 42,908.10

Step by Step Solution

1. Step 1: Write the proportion equation
   82,274.10 : 123,415.20 = 42,908.10 : x
2. Step 2: Convert to fraction form
   82,274.10/123,415.20 = 42,908.10/x
3. Step 3: Cross multiply
   82,274.10x = 123,415.20 × 42,908.10
4. Step 4: Simplify right side
   82,274.10x = 5,295,511,743.12
5. Step 5: Solve for x
   x = 5,295,511,743.12/82,274.10
6. Step 6: Final answer
   x = 64,364.26