Finding the Fourth Proportional to 1,375.72, 1,898.03 and 816.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.72 : 1,898.03 = 816.36 : x
2. Step 2: Convert to fraction form
   1,375.72/1,898.03 = 816.36/x
3. Step 3: Cross multiply
   1,375.72x = 1,898.03 × 816.36
4. Step 4: Simplify right side
   1,375.72x = 1,549,475.77
5. Step 5: Solve for x
   x = 1,549,475.77/1,375.72
6. Step 6: Final answer
   x = 1,126.30