Finding the Fourth Proportional to 1,043.35, 1,436.55 and 885.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,043.35 : 1,436.55 = 885.67 : x
2. Step 2: Convert to fraction form
   1,043.35/1,436.55 = 885.67/x
3. Step 3: Cross multiply
   1,043.35x = 1,436.55 × 885.67
4. Step 4: Simplify right side
   1,043.35x = 1,272,307.71
5. Step 5: Solve for x
   x = 1,272,307.71/1,043.35
6. Step 6: Final answer
   x = 1,219.44