Finding the Fourth Proportional to 1,384.27, 2,076.60 and 518.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.27 : 2,076.60 = 518.50 : x
2. Step 2: Convert to fraction form
   1,384.27/2,076.60 = 518.50/x
3. Step 3: Cross multiply
   1,384.27x = 2,076.60 × 518.50
4. Step 4: Simplify right side
   1,384.27x = 1,076,717.10
5. Step 5: Solve for x
   x = 1,076,717.10/1,384.27
6. Step 6: Final answer
   x = 777.82