Finding the Fourth Proportional to 424,978.93, 637,315.29 and 140,616.99

Step by Step Solution

1. Step 1: Write the proportion equation
   424,978.93 : 637,315.29 = 140,616.99 : x
2. Step 2: Convert to fraction form
   424,978.93/637,315.29 = 140,616.99/x
3. Step 3: Cross multiply
   424,978.93x = 637,315.29 × 140,616.99
4. Step 4: Simplify right side
   424,978.93x = 89,617,355,968.33
5. Step 5: Solve for x
   x = 89,617,355,968.33/424,978.93
6. Step 6: Final answer
   x = 210,874.82