Finding the Fourth Proportional to 1,394.72, 1,925.17 and 1,002.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,394.72 : 1,925.17 = 1,002.88 : x
2. Step 2: Convert to fraction form
   1,394.72/1,925.17 = 1,002.88/x
3. Step 3: Cross multiply
   1,394.72x = 1,925.17 × 1,002.88
4. Step 4: Simplify right side
   1,394.72x = 1,930,714.39
5. Step 5: Solve for x
   x = 1,930,714.39/1,394.72
6. Step 6: Final answer
   x = 1,384.30