Finding the Fourth Proportional to 1,381.47, 1,905.48 and 883.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.47 : 1,905.48 = 883.89 : x
2. Step 2: Convert to fraction form
   1,381.47/1,905.48 = 883.89/x
3. Step 3: Cross multiply
   1,381.47x = 1,905.48 × 883.89
4. Step 4: Simplify right side
   1,381.47x = 1,684,234.72
5. Step 5: Solve for x
   x = 1,684,234.72/1,381.47
6. Step 6: Final answer
   x = 1,219.16