Finding the Fourth Proportional to 1,375.53, 1,897.46 and 815.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.53 : 1,897.46 = 815.82 : x
2. Step 2: Convert to fraction form
   1,375.53/1,897.46 = 815.82/x
3. Step 3: Cross multiply
   1,375.53x = 1,897.46 × 815.82
4. Step 4: Simplify right side
   1,375.53x = 1,547,972.25
5. Step 5: Solve for x
   x = 1,547,972.25/1,375.53
6. Step 6: Final answer
   x = 1,125.37