Finding the Fourth Proportional to 278,504.22, 384,196.05 and 187,745.34

Step by Step Solution

1. Step 1: Write the proportion equation
   278,504.22 : 384,196.05 = 187,745.34 : x
2. Step 2: Convert to fraction form
   278,504.22/384,196.05 = 187,745.34/x
3. Step 3: Cross multiply
   278,504.22x = 384,196.05 × 187,745.34
4. Step 4: Simplify right side
   278,504.22x = 72,131,018,033.91
5. Step 5: Solve for x
   x = 72,131,018,033.91/278,504.22
6. Step 6: Final answer
   x = 258,994.34