Finding the Fourth Proportional to 1,346.78, 1,858.41 and 757.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,346.78 : 1,858.41 = 757.31 : x
2. Step 2: Convert to fraction form
   1,346.78/1,858.41 = 757.31/x
3. Step 3: Cross multiply
   1,346.78x = 1,858.41 × 757.31
4. Step 4: Simplify right side
   1,346.78x = 1,407,383.19
5. Step 5: Solve for x
   x = 1,407,383.19/1,346.78
6. Step 6: Final answer
   x = 1,045.00