Finding the Fourth Proportional to 81,885.68, 122,631.69 and 46,718.72

Step by Step Solution

1. Step 1: Write the proportion equation
   81,885.68 : 122,631.69 = 46,718.72 : x
2. Step 2: Convert to fraction form
   81,885.68/122,631.69 = 46,718.72/x
3. Step 3: Cross multiply
   81,885.68x = 122,631.69 × 46,718.72
4. Step 4: Simplify right side
   81,885.68x = 5,729,195,894.82
5. Step 5: Solve for x
   x = 5,729,195,894.82/81,885.68
6. Step 6: Final answer
   x = 69,965.78