Finding the Fourth Proportional to 1,347.10, 1,858.75 and 850.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,347.10 : 1,858.75 = 850.42 : x
2. Step 2: Convert to fraction form
   1,347.10/1,858.75 = 850.42/x
3. Step 3: Cross multiply
   1,347.10x = 1,858.75 × 850.42
4. Step 4: Simplify right side
   1,347.10x = 1,580,718.18
5. Step 5: Solve for x
   x = 1,580,718.18/1,347.10
6. Step 6: Final answer
   x = 1,173.42