Finding the Fourth Proportional to 1,382.23, 1,907.86 and 910.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.23 : 1,907.86 = 910.47 : x
2. Step 2: Convert to fraction form
   1,382.23/1,907.86 = 910.47/x
3. Step 3: Cross multiply
   1,382.23x = 1,907.86 × 910.47
4. Step 4: Simplify right side
   1,382.23x = 1,737,042.03
5. Step 5: Solve for x
   x = 1,737,042.03/1,382.23
6. Step 6: Final answer
   x = 1,256.70