Finding the Fourth Proportional to 1,359.56, 1,872.87 and 985.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.56 : 1,872.87 = 985.43 : x
2. Step 2: Convert to fraction form
   1,359.56/1,872.87 = 985.43/x
3. Step 3: Cross multiply
   1,359.56x = 1,872.87 × 985.43
4. Step 4: Simplify right side
   1,359.56x = 1,845,582.28
5. Step 5: Solve for x
   x = 1,845,582.28/1,359.56
6. Step 6: Final answer
   x = 1,357.48