Finding the Fourth Proportional to 1,409.99, 1,945.55 and 885.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,409.99 : 1,945.55 = 885.65 : x
2. Step 2: Convert to fraction form
   1,409.99/1,945.55 = 885.65/x
3. Step 3: Cross multiply
   1,409.99x = 1,945.55 × 885.65
4. Step 4: Simplify right side
   1,409.99x = 1,723,068.84
5. Step 5: Solve for x
   x = 1,723,068.84/1,409.99
6. Step 6: Final answer
   x = 1,222.05