Finding the Fourth Proportional to 1,375.53, 1,898.37 and 816.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.53 : 1,898.37 = 816.09 : x
2. Step 2: Convert to fraction form
   1,375.53/1,898.37 = 816.09/x
3. Step 3: Cross multiply
   1,375.53x = 1,898.37 × 816.09
4. Step 4: Simplify right side
   1,375.53x = 1,549,240.77
5. Step 5: Solve for x
   x = 1,549,240.77/1,375.53
6. Step 6: Final answer
   x = 1,126.29