Finding the Fourth Proportional to 450,627, 621,865.82 and 280,861

Step by Step Solution

1. Step 1: Write the proportion equation
   450,627 : 621,865.82 = 280,861 : x
2. Step 2: Convert to fraction form
   450,627/621,865.82 = 280,861/x
3. Step 3: Cross multiply
   450,627x = 621,865.82 × 280,861
4. Step 4: Simplify right side
   450,627x = 174,657,856,071.02
5. Step 5: Solve for x
   x = 174,657,856,071.02/450,627
6. Step 6: Final answer
   x = 387,588.53