Finding the Fourth Proportional to 1,892.90, 2,611.46 and 1,396.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,892.90 : 2,611.46 = 1,396.71 : x
2. Step 2: Convert to fraction form
   1,892.90/2,611.46 = 1,396.71/x
3. Step 3: Cross multiply
   1,892.90x = 2,611.46 × 1,396.71
4. Step 4: Simplify right side
   1,892.90x = 3,647,445.31
5. Step 5: Solve for x
   x = 3,647,445.31/1,892.90
6. Step 6: Final answer
   x = 1,926.91