Finding the Fourth Proportional to 1,395.62, 1,922.88 and 929.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.62 : 1,922.88 = 929.06 : x
2. Step 2: Convert to fraction form
   1,395.62/1,922.88 = 929.06/x
3. Step 3: Cross multiply
   1,395.62x = 1,922.88 × 929.06
4. Step 4: Simplify right side
   1,395.62x = 1,786,470.89
5. Step 5: Solve for x
   x = 1,786,470.89/1,395.62
6. Step 6: Final answer
   x = 1,280.06