Finding the Fourth Proportional to 1,375.30, 1,897.02 and 815.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.30 : 1,897.02 = 815.34 : x
2. Step 2: Convert to fraction form
   1,375.30/1,897.02 = 815.34/x
3. Step 3: Cross multiply
   1,375.30x = 1,897.02 × 815.34
4. Step 4: Simplify right side
   1,375.30x = 1,546,716.29
5. Step 5: Solve for x
   x = 1,546,716.29/1,375.30
6. Step 6: Final answer
   x = 1,124.64