Finding the Fourth Proportional to 447,114, 670,672.72 and 424,690

Step by Step Solution

1. Step 1: Write the proportion equation
   447,114 : 670,672.72 = 424,690 : x
2. Step 2: Convert to fraction form
   447,114/670,672.72 = 424,690/x
3. Step 3: Cross multiply
   447,114x = 670,672.72 × 424,690
4. Step 4: Simplify right side
   447,114x = 284,827,997,456.80
5. Step 5: Solve for x
   x = 284,827,997,456.80/447,114
6. Step 6: Final answer
   x = 637,036.63