Finding the Fourth Proportional to 407,805.31, 562,928.27 and 271,789.62

Step by Step Solution

1. Step 1: Write the proportion equation
   407,805.31 : 562,928.27 = 271,789.62 : x
2. Step 2: Convert to fraction form
   407,805.31/562,928.27 = 271,789.62/x
3. Step 3: Cross multiply
   407,805.31x = 562,928.27 × 271,789.62
4. Step 4: Simplify right side
   407,805.31x = 152,998,060,590.56
5. Step 5: Solve for x
   x = 152,998,060,590.56/407,805.31
6. Step 6: Final answer
   x = 375,174.28