Finding the Fourth Proportional to 393,300.18, 589,411.89 and 297,158.31

Step by Step Solution

1. Step 1: Write the proportion equation
   393,300.18 : 589,411.89 = 297,158.31 : x
2. Step 2: Convert to fraction form
   393,300.18/589,411.89 = 297,158.31/x
3. Step 3: Cross multiply
   393,300.18x = 589,411.89 × 297,158.31
4. Step 4: Simplify right side
   393,300.18x = 175,148,641,126.31
5. Step 5: Solve for x
   x = 175,148,641,126.31/393,300.18
6. Step 6: Final answer
   x = 445,330.69