Finding the Fourth Proportional to 296,498.87, 444,791.64 and 86,109.47

Step by Step Solution

1. Step 1: Write the proportion equation
   296,498.87 : 444,791.64 = 86,109.47 : x
2. Step 2: Convert to fraction form
   296,498.87/444,791.64 = 86,109.47/x
3. Step 3: Cross multiply
   296,498.87x = 444,791.64 × 86,109.47
4. Step 4: Simplify right side
   296,498.87x = 38,300,772,380.83
5. Step 5: Solve for x
   x = 38,300,772,380.83/296,498.87
6. Step 6: Final answer
   x = 129,176.79