Finding the Fourth Proportional to 81,890.38, 122,638.72 and 46,723.42

Step by Step Solution

1. Step 1: Write the proportion equation
   81,890.38 : 122,638.72 = 46,723.42 : x
2. Step 2: Convert to fraction form
   81,890.38/122,638.72 = 46,723.42/x
3. Step 3: Cross multiply
   81,890.38x = 122,638.72 × 46,723.42
4. Step 4: Simplify right side
   81,890.38x = 5,730,100,422.82
5. Step 5: Solve for x
   x = 5,730,100,422.82/81,890.38
6. Step 6: Final answer
   x = 69,972.82