Finding the Fourth Proportional to 555,401.72, 766,461.81 and 310,375.71

Step by Step Solution

1. Step 1: Write the proportion equation
   555,401.72 : 766,461.81 = 310,375.71 : x
2. Step 2: Convert to fraction form
   555,401.72/766,461.81 = 310,375.71/x
3. Step 3: Cross multiply
   555,401.72x = 766,461.81 × 310,375.71
4. Step 4: Simplify right side
   555,401.72x = 237,891,123,082.45
5. Step 5: Solve for x
   x = 237,891,123,082.45/555,401.72
6. Step 6: Final answer
   x = 428,322.63