Finding the Fourth Proportional to 1,574.69, 2,173.08 and 985.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,574.69 : 2,173.08 = 985.56 : x
2. Step 2: Convert to fraction form
   1,574.69/2,173.08 = 985.56/x
3. Step 3: Cross multiply
   1,574.69x = 2,173.08 × 985.56
4. Step 4: Simplify right side
   1,574.69x = 2,141,700.72
5. Step 5: Solve for x
   x = 2,141,700.72/1,574.69
6. Step 6: Final answer
   x = 1,360.08