Finding the Fourth Proportional to 1,385.24, 1,910.99 and 887.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.24 : 1,910.99 = 887.63 : x
2. Step 2: Convert to fraction form
   1,385.24/1,910.99 = 887.63/x
3. Step 3: Cross multiply
   1,385.24x = 1,910.99 × 887.63
4. Step 4: Simplify right side
   1,385.24x = 1,696,244.72
5. Step 5: Solve for x
   x = 1,696,244.72/1,385.24
6. Step 6: Final answer
   x = 1,224.52