Finding the Fourth Proportional to 81,888.38, 122,635.72 and 46,721.42

Step by Step Solution

1. Step 1: Write the proportion equation
   81,888.38 : 122,635.72 = 46,721.42 : x
2. Step 2: Convert to fraction form
   81,888.38/122,635.72 = 46,721.42/x
3. Step 3: Cross multiply
   81,888.38x = 122,635.72 × 46,721.42
4. Step 4: Simplify right side
   81,888.38x = 5,729,714,981.12
5. Step 5: Solve for x
   x = 5,729,714,981.12/81,888.38
6. Step 6: Final answer
   x = 69,969.82