Finding the Fourth Proportional to 486,858.72, 671,878.72 and 272,022.42

Step by Step Solution

1. Step 1: Write the proportion equation
   486,858.72 : 671,878.72 = 272,022.42 : x
2. Step 2: Convert to fraction form
   486,858.72/671,878.72 = 272,022.42/x
3. Step 3: Cross multiply
   486,858.72x = 671,878.72 × 272,022.42
4. Step 4: Simplify right side
   486,858.72x = 182,766,075,360.90
5. Step 5: Solve for x
   x = 182,766,075,360.90/486,858.72
6. Step 6: Final answer
   x = 375,398.59