Finding the Fourth Proportional to 2,189.31, 3,280.59 and 1,077.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.31 : 3,280.59 = 1,077.45 : x
2. Step 2: Convert to fraction form
   2,189.31/3,280.59 = 1,077.45/x
3. Step 3: Cross multiply
   2,189.31x = 3,280.59 × 1,077.45
4. Step 4: Simplify right side
   2,189.31x = 3,534,671.70
5. Step 5: Solve for x
   x = 3,534,671.70/2,189.31
6. Step 6: Final answer
   x = 1,614.51