Finding the Fourth Proportional to 2,069.74, 3,102.54 and 1,145.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,069.74 : 3,102.54 = 1,145.71 : x
2. Step 2: Convert to fraction form
   2,069.74/3,102.54 = 1,145.71/x
3. Step 3: Cross multiply
   2,069.74x = 3,102.54 × 1,145.71
4. Step 4: Simplify right side
   2,069.74x = 3,554,611.10
5. Step 5: Solve for x
   x = 3,554,611.10/2,069.74
6. Step 6: Final answer
   x = 1,717.42