Finding the Fourth Proportional to 298,066.23, 411,123.20 and 202,406.85

Step by Step Solution

1. Step 1: Write the proportion equation
   298,066.23 : 411,123.20 = 202,406.85 : x
2. Step 2: Convert to fraction form
   298,066.23/411,123.20 = 202,406.85/x
3. Step 3: Cross multiply
   298,066.23x = 411,123.20 × 202,406.85
4. Step 4: Simplify right side
   298,066.23x = 83,214,150,861.89
5. Step 5: Solve for x
   x = 83,214,150,861.89/298,066.23
6. Step 6: Final answer
   x = 279,180.07