Finding the Fourth Proportional to 2,189.79, 3,285.77 and 1,094.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.79 : 3,285.77 = 1,094.31 : x
2. Step 2: Convert to fraction form
   2,189.79/3,285.77 = 1,094.31/x
3. Step 3: Cross multiply
   2,189.79x = 3,285.77 × 1,094.31
4. Step 4: Simplify right side
   2,189.79x = 3,595,645.50
5. Step 5: Solve for x
   x = 3,595,645.50/2,189.79
6. Step 6: Final answer
   x = 1,642.00