Finding the Fourth Proportional to 1,892.42, 2,611.57 and 1,053.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,892.42 : 2,611.57 = 1,053.20 : x
2. Step 2: Convert to fraction form
   1,892.42/2,611.57 = 1,053.20/x
3. Step 3: Cross multiply
   1,892.42x = 2,611.57 × 1,053.20
4. Step 4: Simplify right side
   1,892.42x = 2,750,505.52
5. Step 5: Solve for x
   x = 2,750,505.52/1,892.42
6. Step 6: Final answer
   x = 1,453.43