Finding the Fourth Proportional to 455,538.83, 628,615.98 and 274,309.43

Step by Step Solution

1. Step 1: Write the proportion equation
   455,538.83 : 628,615.98 = 274,309.43 : x
2. Step 2: Convert to fraction form
   455,538.83/628,615.98 = 274,309.43/x
3. Step 3: Cross multiply
   455,538.83x = 628,615.98 × 274,309.43
4. Step 4: Simplify right side
   455,538.83x = 172,435,288,019.61
5. Step 5: Solve for x
   x = 172,435,288,019.61/455,538.83
6. Step 6: Final answer
   x = 378,530.39