Finding the Fourth Proportional to 1,438.28, 1,984.69 and 848.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,438.28 : 1,984.69 = 848.69 : x
2. Step 2: Convert to fraction form
   1,438.28/1,984.69 = 848.69/x
3. Step 3: Cross multiply
   1,438.28x = 1,984.69 × 848.69
4. Step 4: Simplify right side
   1,438.28x = 1,684,386.56
5. Step 5: Solve for x
   x = 1,684,386.56/1,438.28
6. Step 6: Final answer
   x = 1,171.11