Finding the Fourth Proportional to 841,905.72, 1,263,356.89 and 309,800.42

Step by Step Solution

1. Step 1: Write the proportion equation
   841,905.72 : 1,263,356.89 = 309,800.42 : x
2. Step 2: Convert to fraction form
   841,905.72/1,263,356.89 = 309,800.42/x
3. Step 3: Cross multiply
   841,905.72x = 1,263,356.89 × 309,800.42
4. Step 4: Simplify right side
   841,905.72x = 391,388,495,895.72
5. Step 5: Solve for x
   x = 391,388,495,895.72/841,905.72
6. Step 6: Final answer
   x = 464,884.00