Finding the Fourth Proportional to 401,320.72, 553,744.61 and 237,947.05

Step by Step Solution

1. Step 1: Write the proportion equation
   401,320.72 : 553,744.61 = 237,947.05 : x
2. Step 2: Convert to fraction form
   401,320.72/553,744.61 = 237,947.05/x
3. Step 3: Cross multiply
   401,320.72x = 553,744.61 × 237,947.05
4. Step 4: Simplify right side
   401,320.72x = 131,761,893,634.18
5. Step 5: Solve for x
   x = 131,761,893,634.18/401,320.72
6. Step 6: Final answer
   x = 328,320.69