Finding the Fourth Proportional to 1,288.52, 1,931.98 and 508.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,288.52 : 1,931.98 = 508.04 : x
2. Step 2: Convert to fraction form
   1,288.52/1,931.98 = 508.04/x
3. Step 3: Cross multiply
   1,288.52x = 1,931.98 × 508.04
4. Step 4: Simplify right side
   1,288.52x = 981,523.12
5. Step 5: Solve for x
   x = 981,523.12/1,288.52
6. Step 6: Final answer
   x = 761.74