Finding the Fourth Proportional to 486,002.61, 670,681.89 and 271,142.55

Step by Step Solution

1. Step 1: Write the proportion equation
   486,002.61 : 670,681.89 = 271,142.55 : x
2. Step 2: Convert to fraction form
   486,002.61/670,681.89 = 271,142.55/x
3. Step 3: Cross multiply
   486,002.61x = 670,681.89 × 271,142.55
4. Step 4: Simplify right side
   486,002.61x = 181,850,397,893.42
5. Step 5: Solve for x
   x = 181,850,397,893.42/486,002.61
6. Step 6: Final answer
   x = 374,175.76