Finding the Fourth Proportional to 1,346.06, 1,857.59 and 880.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,346.06 : 1,857.59 = 880.31 : x
2. Step 2: Convert to fraction form
   1,346.06/1,857.59 = 880.31/x
3. Step 3: Cross multiply
   1,346.06x = 1,857.59 × 880.31
4. Step 4: Simplify right side
   1,346.06x = 1,635,258.60
5. Step 5: Solve for x
   x = 1,635,258.60/1,346.06
6. Step 6: Final answer
   x = 1,214.85