Finding the Fourth Proportional to 82,112.72, 123,043.80 and 42,682.64

Step by Step Solution

1. Step 1: Write the proportion equation
   82,112.72 : 123,043.80 = 42,682.64 : x
2. Step 2: Convert to fraction form
   82,112.72/123,043.80 = 42,682.64/x
3. Step 3: Cross multiply
   82,112.72x = 123,043.80 × 42,682.64
4. Step 4: Simplify right side
   82,112.72x = 5,251,834,219.63
5. Step 5: Solve for x
   x = 5,251,834,219.63/82,112.72
6. Step 6: Final answer
   x = 63,958.84