Finding the Fourth Proportional to 309,964.86, 426,663.39 and 271,634.10

Step by Step Solution

1. Step 1: Write the proportion equation
   309,964.86 : 426,663.39 = 271,634.10 : x
2. Step 2: Convert to fraction form
   309,964.86/426,663.39 = 271,634.10/x
3. Step 3: Cross multiply
   309,964.86x = 426,663.39 × 271,634.10
4. Step 4: Simplify right side
   309,964.86x = 115,896,325,945.60
5. Step 5: Solve for x
   x = 115,896,325,945.60/309,964.86
6. Step 6: Final answer
   x = 373,901.50