Finding the Fourth Proportional to 807,423.92, 1,211,372.72 and 238,820

Step by Step Solution

1. Step 1: Write the proportion equation
   807,423.92 : 1,211,372.72 = 238,820 : x
2. Step 2: Convert to fraction form
   807,423.92/1,211,372.72 = 238,820/x
3. Step 3: Cross multiply
   807,423.92x = 1,211,372.72 × 238,820
4. Step 4: Simplify right side
   807,423.92x = 289,300,031,796.30
5. Step 5: Solve for x
   x = 289,300,031,796.30/807,423.92
6. Step 6: Final answer
   x = 358,300.05