Finding the Fourth Proportional to 81,681.08, 122,489.89 and 31,754.57

Step by Step Solution

1. Step 1: Write the proportion equation
   81,681.08 : 122,489.89 = 31,754.57 : x
2. Step 2: Convert to fraction form
   81,681.08/122,489.89 = 31,754.57/x
3. Step 3: Cross multiply
   81,681.08x = 122,489.89 × 31,754.57
4. Step 4: Simplify right side
   81,681.08x = 3,889,613,786.30
5. Step 5: Solve for x
   x = 3,889,613,786.30/81,681.08
6. Step 6: Final answer
   x = 47,619.52