Finding the Fourth Proportional to 1,084.48, 1,623.87 and 910.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,084.48 : 1,623.87 = 910.72 : x
2. Step 2: Convert to fraction form
   1,084.48/1,623.87 = 910.72/x
3. Step 3: Cross multiply
   1,084.48x = 1,623.87 × 910.72
4. Step 4: Simplify right side
   1,084.48x = 1,478,890.89
5. Step 5: Solve for x
   x = 1,478,890.89/1,084.48
6. Step 6: Final answer
   x = 1,363.69