Finding the Fourth Proportional to 2,611.53, 3,914.52 and 1,223.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,611.53 : 3,914.52 = 1,223.69 : x
2. Step 2: Convert to fraction form
   2,611.53/3,914.52 = 1,223.69/x
3. Step 3: Cross multiply
   2,611.53x = 3,914.52 × 1,223.69
4. Step 4: Simplify right side
   2,611.53x = 4,790,139.41
5. Step 5: Solve for x
   x = 4,790,139.41/2,611.53
6. Step 6: Final answer
   x = 1,834.23