Finding the Fourth Proportional to 1,384.43, 1,909.98 and 887.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.43 : 1,909.98 = 887.36 : x
2. Step 2: Convert to fraction form
   1,384.43/1,909.98 = 887.36/x
3. Step 3: Cross multiply
   1,384.43x = 1,909.98 × 887.36
4. Step 4: Simplify right side
   1,384.43x = 1,694,830.30
5. Step 5: Solve for x
   x = 1,694,830.30/1,384.43
6. Step 6: Final answer
   x = 1,224.21