Finding the Fourth Proportional to 1,349.43, 1,861.95 and 789.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,349.43 : 1,861.95 = 789.99 : x
2. Step 2: Convert to fraction form
   1,349.43/1,861.95 = 789.99/x
3. Step 3: Cross multiply
   1,349.43x = 1,861.95 × 789.99
4. Step 4: Simplify right side
   1,349.43x = 1,470,921.88
5. Step 5: Solve for x
   x = 1,470,921.88/1,349.43
6. Step 6: Final answer
   x = 1,090.03