Finding the Fourth Proportional to 469,858, 648,942.24 and 309,430.12

Step by Step Solution

1. Step 1: Write the proportion equation
   469,858 : 648,942.24 = 309,430.12 : x
2. Step 2: Convert to fraction form
   469,858/648,942.24 = 309,430.12/x
3. Step 3: Cross multiply
   469,858x = 648,942.24 × 309,430.12
4. Step 4: Simplify right side
   469,858x = 200,802,275,196.27
5. Step 5: Solve for x
   x = 200,802,275,196.27/469,858
6. Step 6: Final answer
   x = 427,368.00