Finding the Fourth Proportional to 82,138.73, 123,189.50 and 37,722.78

Step by Step Solution

1. Step 1: Write the proportion equation
   82,138.73 : 123,189.50 = 37,722.78 : x
2. Step 2: Convert to fraction form
   82,138.73/123,189.50 = 37,722.78/x
3. Step 3: Cross multiply
   82,138.73x = 123,189.50 × 37,722.78
4. Step 4: Simplify right side
   82,138.73x = 4,647,050,406.81
5. Step 5: Solve for x
   x = 4,647,050,406.81/82,138.73
6. Step 6: Final answer
   x = 56,575.63