Finding the Fourth Proportional to 469,178.37, 648,004.24 and 308,749.62

Step by Step Solution

1. Step 1: Write the proportion equation
   469,178.37 : 648,004.24 = 308,749.62 : x
2. Step 2: Convert to fraction form
   469,178.37/648,004.24 = 308,749.62/x
3. Step 3: Cross multiply
   469,178.37x = 648,004.24 × 308,749.62
4. Step 4: Simplify right side
   469,178.37x = 200,071,061,314.64
5. Step 5: Solve for x
   x = 200,071,061,314.64/469,178.37
6. Step 6: Final answer
   x = 426,428.57