Finding the Fourth Proportional to 1,399.28, 1,930.52 and 1,000.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.28 : 1,930.52 = 1,000.98 : x
2. Step 2: Convert to fraction form
   1,399.28/1,930.52 = 1,000.98/x
3. Step 3: Cross multiply
   1,399.28x = 1,930.52 × 1,000.98
4. Step 4: Simplify right side
   1,399.28x = 1,932,411.91
5. Step 5: Solve for x
   x = 1,932,411.91/1,399.28
6. Step 6: Final answer
   x = 1,381.00