Finding the Fourth Proportional to 1,380.46, 1,904.76 and 882.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.46 : 1,904.76 = 882.72 : x
2. Step 2: Convert to fraction form
   1,380.46/1,904.76 = 882.72/x
3. Step 3: Cross multiply
   1,380.46x = 1,904.76 × 882.72
4. Step 4: Simplify right side
   1,380.46x = 1,681,369.75
5. Step 5: Solve for x
   x = 1,681,369.75/1,380.46
6. Step 6: Final answer
   x = 1,217.98