Finding the Fourth Proportional to 611,139.42, 843,359.72 and 339,191.37

Step by Step Solution

1. Step 1: Write the proportion equation
   611,139.42 : 843,359.72 = 339,191.37 : x
2. Step 2: Convert to fraction form
   611,139.42/843,359.72 = 339,191.37/x
3. Step 3: Cross multiply
   611,139.42x = 843,359.72 × 339,191.37
4. Step 4: Simplify right side
   611,139.42x = 286,060,337,133.66
5. Step 5: Solve for x
   x = 286,060,337,133.66/611,139.42
6. Step 6: Final answer
   x = 468,077.05