Finding the Fourth Proportional to 82,020.88, 122,987.56 and 42,479.92

Step by Step Solution

1. Step 1: Write the proportion equation
   82,020.88 : 122,987.56 = 42,479.92 : x
2. Step 2: Convert to fraction form
   82,020.88/122,987.56 = 42,479.92/x
3. Step 3: Cross multiply
   82,020.88x = 122,987.56 × 42,479.92
4. Step 4: Simplify right side
   82,020.88x = 5,224,501,709.80
5. Step 5: Solve for x
   x = 5,224,501,709.80/82,020.88
6. Step 6: Final answer
   x = 63,697.22