Finding the Fourth Proportional to 87,357, 120,556.92 and 49,128.59

Step by Step Solution

1. Step 1: Write the proportion equation
   87,357 : 120,556.92 = 49,128.59 : x
2. Step 2: Convert to fraction form
   87,357/120,556.92 = 49,128.59/x
3. Step 3: Cross multiply
   87,357x = 120,556.92 × 49,128.59
4. Step 4: Simplify right side
   87,357x = 5,922,790,891.56
5. Step 5: Solve for x
   x = 5,922,790,891.56/87,357
6. Step 6: Final answer
   x = 67,799.84