Finding the Fourth Proportional to 711,401.59, 981,727.05 and 389,117.98

Step by Step Solution

1. Step 1: Write the proportion equation
   711,401.59 : 981,727.05 = 389,117.98 : x
2. Step 2: Convert to fraction form
   711,401.59/981,727.05 = 389,117.98/x
3. Step 3: Cross multiply
   711,401.59x = 981,727.05 × 389,117.98
4. Step 4: Simplify right side
   711,401.59x = 382,007,646,607.36
5. Step 5: Solve for x
   x = 382,007,646,607.36/711,401.59
6. Step 6: Final answer
   x = 536,978.90