Finding the Fourth Proportional to 1,382.16, 1,907.05 and 934.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.16 : 1,907.05 = 934.87 : x
2. Step 2: Convert to fraction form
   1,382.16/1,907.05 = 934.87/x
3. Step 3: Cross multiply
   1,382.16x = 1,907.05 × 934.87
4. Step 4: Simplify right side
   1,382.16x = 1,782,843.83
5. Step 5: Solve for x
   x = 1,782,843.83/1,382.16
6. Step 6: Final answer
   x = 1,289.90