Finding the Fourth Proportional to 1,395.72, 1,928.60 and 1,002.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.72 : 1,928.60 = 1,002.06 : x
2. Step 2: Convert to fraction form
   1,395.72/1,928.60 = 1,002.06/x
3. Step 3: Cross multiply
   1,395.72x = 1,928.60 × 1,002.06
4. Step 4: Simplify right side
   1,395.72x = 1,932,572.92
5. Step 5: Solve for x
   x = 1,932,572.92/1,395.72
6. Step 6: Final answer
   x = 1,384.64