Finding the Fourth Proportional to 149,665.86, 206,537.04 and 81,683.91

Step by Step Solution

1. Step 1: Write the proportion equation
   149,665.86 : 206,537.04 = 81,683.91 : x
2. Step 2: Convert to fraction form
   149,665.86/206,537.04 = 81,683.91/x
3. Step 3: Cross multiply
   149,665.86x = 206,537.04 × 81,683.91
4. Step 4: Simplify right side
   149,665.86x = 16,870,752,987.03
5. Step 5: Solve for x
   x = 16,870,752,987.03/149,665.86
6. Step 6: Final answer
   x = 112,722.79