Finding the Fourth Proportional to 1,380.15, 1,903.82 and 882.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.15 : 1,903.82 = 882.41 : x
2. Step 2: Convert to fraction form
   1,380.15/1,903.82 = 882.41/x
3. Step 3: Cross multiply
   1,380.15x = 1,903.82 × 882.41
4. Step 4: Simplify right side
   1,380.15x = 1,679,935.88
5. Step 5: Solve for x
   x = 1,679,935.88/1,380.15
6. Step 6: Final answer
   x = 1,217.21