Finding the Fourth Proportional to 81,718.69, 122,467.30 and 42,303.48

Step by Step Solution

1. Step 1: Write the proportion equation
   81,718.69 : 122,467.30 = 42,303.48 : x
2. Step 2: Convert to fraction form
   81,718.69/122,467.30 = 42,303.48/x
3. Step 3: Cross multiply
   81,718.69x = 122,467.30 × 42,303.48
4. Step 4: Simplify right side
   81,718.69x = 5,180,792,976.20
5. Step 5: Solve for x
   x = 5,180,792,976.20/81,718.69
6. Step 6: Final answer
   x = 63,397.90