Finding the Fourth Proportional to 1,423.55, 1,964.49 and 785.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.55 : 1,964.49 = 785.50 : x
2. Step 2: Convert to fraction form
   1,423.55/1,964.49 = 785.50/x
3. Step 3: Cross multiply
   1,423.55x = 1,964.49 × 785.50
4. Step 4: Simplify right side
   1,423.55x = 1,543,103.98
5. Step 5: Solve for x
   x = 1,543,103.98/1,423.55
6. Step 6: Final answer
   x = 1,083.98