Finding the Fourth Proportional to 711,401.93, 981,742.28 and 389,105.10

Step by Step Solution

1. Step 1: Write the proportion equation
   711,401.93 : 981,742.28 = 389,105.10 : x
2. Step 2: Convert to fraction form
   711,401.93/981,742.28 = 389,105.10/x
3. Step 3: Cross multiply
   711,401.93x = 981,742.28 × 389,105.10
4. Step 4: Simplify right side
   711,401.93x = 382,000,926,088.10
5. Step 5: Solve for x
   x = 382,000,926,088.10/711,401.93
6. Step 6: Final answer
   x = 536,969.20