Finding the Fourth Proportional to 1,384.06, 2,076.06 and 806.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.06 : 2,076.06 = 806.50 : x
2. Step 2: Convert to fraction form
   1,384.06/2,076.06 = 806.50/x
3. Step 3: Cross multiply
   1,384.06x = 2,076.06 × 806.50
4. Step 4: Simplify right side
   1,384.06x = 1,674,342.39
5. Step 5: Solve for x
   x = 1,674,342.39/1,384.06
6. Step 6: Final answer
   x = 1,209.73