Finding the Fourth Proportional to 309,722.71, 464,540.28 and 99,333.31

Step by Step Solution

1. Step 1: Write the proportion equation
   309,722.71 : 464,540.28 = 99,333.31 : x
2. Step 2: Convert to fraction form
   309,722.71/464,540.28 = 99,333.31/x
3. Step 3: Cross multiply
   309,722.71x = 464,540.28 × 99,333.31
4. Step 4: Simplify right side
   309,722.71x = 46,144,323,640.73
5. Step 5: Solve for x
   x = 46,144,323,640.73/309,722.71
6. Step 6: Final answer
   x = 148,985.92