Finding the Fourth Proportional to 272,300.22, 408,396.34 and 258,797.82

Step by Step Solution

1. Step 1: Write the proportion equation
   272,300.22 : 408,396.34 = 258,797.82 : x
2. Step 2: Convert to fraction form
   272,300.22/408,396.34 = 258,797.82/x
3. Step 3: Cross multiply
   272,300.22x = 408,396.34 × 258,797.82
4. Step 4: Simplify right side
   272,300.22x = 105,692,082,487.98
5. Step 5: Solve for x
   x = 105,692,082,487.98/272,300.22
6. Step 6: Final answer
   x = 388,145.42