Finding the Fourth Proportional to 1,385.34, 1,910.04 and 887.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.34 : 1,910.04 = 887.16 : x
2. Step 2: Convert to fraction form
   1,385.34/1,910.04 = 887.16/x
3. Step 3: Cross multiply
   1,385.34x = 1,910.04 × 887.16
4. Step 4: Simplify right side
   1,385.34x = 1,694,511.09
5. Step 5: Solve for x
   x = 1,694,511.09/1,385.34
6. Step 6: Final answer
   x = 1,223.17