Finding the Fourth Proportional to 1,439.82, 2,157.33 and 1,385.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,439.82 : 2,157.33 = 1,385.82 : x
2. Step 2: Convert to fraction form
   1,439.82/2,157.33 = 1,385.82/x
3. Step 3: Cross multiply
   1,439.82x = 2,157.33 × 1,385.82
4. Step 4: Simplify right side
   1,439.82x = 2,989,671.06
5. Step 5: Solve for x
   x = 2,989,671.06/1,439.82
6. Step 6: Final answer
   x = 2,076.42