Finding the Fourth Proportional to 1,002.91, 1,384.56 and 923.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.91 : 1,384.56 = 923.86 : x
2. Step 2: Convert to fraction form
   1,002.91/1,384.56 = 923.86/x
3. Step 3: Cross multiply
   1,002.91x = 1,384.56 × 923.86
4. Step 4: Simplify right side
   1,002.91x = 1,279,139.60
5. Step 5: Solve for x
   x = 1,279,139.60/1,002.91
6. Step 6: Final answer
   x = 1,275.43