Finding the Fourth Proportional to 2,116.87, 3,173.47 and 1,019.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.87 : 3,173.47 = 1,019.72 : x
2. Step 2: Convert to fraction form
   2,116.87/3,173.47 = 1,019.72/x
3. Step 3: Cross multiply
   2,116.87x = 3,173.47 × 1,019.72
4. Step 4: Simplify right side
   2,116.87x = 3,236,056.21
5. Step 5: Solve for x
   x = 3,236,056.21/2,116.87
6. Step 6: Final answer
   x = 1,528.70