Finding the Fourth Proportional to 1,384.27, 1,910.11 and 887.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.27 : 1,910.11 = 887.58 : x
2. Step 2: Convert to fraction form
   1,384.27/1,910.11 = 887.58/x
3. Step 3: Cross multiply
   1,384.27x = 1,910.11 × 887.58
4. Step 4: Simplify right side
   1,384.27x = 1,695,377.75
5. Step 5: Solve for x
   x = 1,695,377.75/1,384.27
6. Step 6: Final answer
   x = 1,224.75