Finding the Fourth Proportional to 1,371.35, 1,892.01 and 839.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.35 : 1,892.01 = 839.67 : x
2. Step 2: Convert to fraction form
   1,371.35/1,892.01 = 839.67/x
3. Step 3: Cross multiply
   1,371.35x = 1,892.01 × 839.67
4. Step 4: Simplify right side
   1,371.35x = 1,588,659.84
5. Step 5: Solve for x
   x = 1,588,659.84/1,371.35
6. Step 6: Final answer
   x = 1,158.47