Finding the Fourth Proportional to 1,346.43, 1,858.01 and 815.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,346.43 : 1,858.01 = 815.46 : x
2. Step 2: Convert to fraction form
   1,346.43/1,858.01 = 815.46/x
3. Step 3: Cross multiply
   1,346.43x = 1,858.01 × 815.46
4. Step 4: Simplify right side
   1,346.43x = 1,515,132.83
5. Step 5: Solve for x
   x = 1,515,132.83/1,346.43
6. Step 6: Final answer
   x = 1,125.30