Finding the Fourth Proportional to 1,380.09, 1,904.82 and 882.66

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.09 : 1,904.82 = 882.66 : x
2. Step 2: Convert to fraction form
   1,380.09/1,904.82 = 882.66/x
3. Step 3: Cross multiply
   1,380.09x = 1,904.82 × 882.66
4. Step 4: Simplify right side
   1,380.09x = 1,681,308.42
5. Step 5: Solve for x
   x = 1,681,308.42/1,380.09
6. Step 6: Final answer
   x = 1,218.26