Finding the Fourth Proportional to 139,760.39, 209,464.71 and 75,716.06

Step by Step Solution

1. Step 1: Write the proportion equation
   139,760.39 : 209,464.71 = 75,716.06 : x
2. Step 2: Convert to fraction form
   139,760.39/209,464.71 = 75,716.06/x
3. Step 3: Cross multiply
   139,760.39x = 209,464.71 × 75,716.06
4. Step 4: Simplify right side
   139,760.39x = 15,859,842,794.27
5. Step 5: Solve for x
   x = 15,859,842,794.27/139,760.39
6. Step 6: Final answer
   x = 113,478.81