Finding the Fourth Proportional to 1,349.34, 1,861.76 and 789.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,349.34 : 1,861.76 = 789.50 : x
2. Step 2: Convert to fraction form
   1,349.34/1,861.76 = 789.50/x
3. Step 3: Cross multiply
   1,349.34x = 1,861.76 × 789.50
4. Step 4: Simplify right side
   1,349.34x = 1,469,846.26
5. Step 5: Solve for x
   x = 1,469,846.26/1,349.34
6. Step 6: Final answer
   x = 1,089.31