Finding the Fourth Proportional to 188,685.92, 283,106.64 and 139,016.72

Step by Step Solution

1. Step 1: Write the proportion equation
   188,685.92 : 283,106.64 = 139,016.72 : x
2. Step 2: Convert to fraction form
   188,685.92/283,106.64 = 139,016.72/x
3. Step 3: Cross multiply
   188,685.92x = 283,106.64 × 139,016.72
4. Step 4: Simplify right side
   188,685.92x = 39,356,556,503.02
5. Step 5: Solve for x
   x = 39,356,556,503.02/188,685.92
6. Step 6: Final answer
   x = 208,582.37