Finding the Fourth Proportional to 1,375.71, 1,898.16 and 816.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.71 : 1,898.16 = 816.05 : x
2. Step 2: Convert to fraction form
   1,375.71/1,898.16 = 816.05/x
3. Step 3: Cross multiply
   1,375.71x = 1,898.16 × 816.05
4. Step 4: Simplify right side
   1,375.71x = 1,548,983.98
5. Step 5: Solve for x
   x = 1,548,983.98/1,375.71
6. Step 6: Final answer
   x = 1,125.95