Finding the Fourth Proportional to 2,285.51, 3,427.61 and 1,189.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,285.51 : 3,427.61 = 1,189.31 : x
2. Step 2: Convert to fraction form
   2,285.51/3,427.61 = 1,189.31/x
3. Step 3: Cross multiply
   2,285.51x = 3,427.61 × 1,189.31
4. Step 4: Simplify right side
   2,285.51x = 4,076,467.76
5. Step 5: Solve for x
   x = 4,076,467.76/2,285.51
6. Step 6: Final answer
   x = 1,783.62