Finding the Fourth Proportional to 1,385.22, 2,076.89 and 727.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.22 : 2,076.89 = 727.47 : x
2. Step 2: Convert to fraction form
   1,385.22/2,076.89 = 727.47/x
3. Step 3: Cross multiply
   1,385.22x = 2,076.89 × 727.47
4. Step 4: Simplify right side
   1,385.22x = 1,510,871.53
5. Step 5: Solve for x
   x = 1,510,871.53/1,385.22
6. Step 6: Final answer
   x = 1,090.71