Finding the Fourth Proportional to 1,382.47, 1,907.25 and 850.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.47 : 1,907.25 = 850.91 : x
2. Step 2: Convert to fraction form
   1,382.47/1,907.25 = 850.91/x
3. Step 3: Cross multiply
   1,382.47x = 1,907.25 × 850.91
4. Step 4: Simplify right side
   1,382.47x = 1,622,885.37
5. Step 5: Solve for x
   x = 1,622,885.37/1,382.47
6. Step 6: Final answer
   x = 1,173.90