Finding the Fourth Proportional to 309,659.39, 464,404.76 and 84,966.55

Step by Step Solution

1. Step 1: Write the proportion equation
   309,659.39 : 464,404.76 = 84,966.55 : x
2. Step 2: Convert to fraction form
   309,659.39/464,404.76 = 84,966.55/x
3. Step 3: Cross multiply
   309,659.39x = 464,404.76 × 84,966.55
4. Step 4: Simplify right side
   309,659.39x = 39,458,870,260.78
5. Step 5: Solve for x
   x = 39,458,870,260.78/309,659.39
6. Step 6: Final answer
   x = 127,426.69