Finding the Fourth Proportional to 1,574.59, 2,173.71 and 1,219.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,574.59 : 2,173.71 = 1,219.72 : x
2. Step 2: Convert to fraction form
   1,574.59/2,173.71 = 1,219.72/x
3. Step 3: Cross multiply
   1,574.59x = 2,173.71 × 1,219.72
4. Step 4: Simplify right side
   1,574.59x = 2,651,317.56
5. Step 5: Solve for x
   x = 2,651,317.56/1,574.59
6. Step 6: Final answer
   x = 1,683.81