Finding the Fourth Proportional to 469,851, 648,932.58 and 309,423.12

Step by Step Solution

1. Step 1: Write the proportion equation
   469,851 : 648,932.58 = 309,423.12 : x
2. Step 2: Convert to fraction form
   469,851/648,932.58 = 309,423.12/x
3. Step 3: Cross multiply
   469,851x = 648,932.58 × 309,423.12
4. Step 4: Simplify right side
   469,851x = 200,794,743,573.25
5. Step 5: Solve for x
   x = 200,794,743,573.25/469,851
6. Step 6: Final answer
   x = 427,358.34