Finding the Fourth Proportional to 139,588.32, 209,470 and 73,081.68

Step by Step Solution

1. Step 1: Write the proportion equation
   139,588.32 : 209,470 = 73,081.68 : x
2. Step 2: Convert to fraction form
   139,588.32/209,470 = 73,081.68/x
3. Step 3: Cross multiply
   139,588.32x = 209,470 × 73,081.68
4. Step 4: Simplify right side
   139,588.32x = 15,308,419,509.60
5. Step 5: Solve for x
   x = 15,308,419,509.60/139,588.32
6. Step 6: Final answer
   x = 109,668.34