Finding the Fourth Proportional to 387,284.50, 580,922.25 and 272,962.72

Step by Step Solution

1. Step 1: Write the proportion equation
   387,284.50 : 580,922.25 = 272,962.72 : x
2. Step 2: Convert to fraction form
   387,284.50/580,922.25 = 272,962.72/x
3. Step 3: Cross multiply
   387,284.50x = 580,922.25 × 272,962.72
4. Step 4: Simplify right side
   387,284.50x = 158,570,117,468.52
5. Step 5: Solve for x
   x = 158,570,117,468.52/387,284.50
6. Step 6: Final answer
   x = 409,440.91