Finding the Fourth Proportional to 1,000.42, 1,499.32 and 691.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,000.42 : 1,499.32 = 691.78 : x
2. Step 2: Convert to fraction form
   1,000.42/1,499.32 = 691.78/x
3. Step 3: Cross multiply
   1,000.42x = 1,499.32 × 691.78
4. Step 4: Simplify right side
   1,000.42x = 1,037,199.59
5. Step 5: Solve for x
   x = 1,037,199.59/1,000.42
6. Step 6: Final answer
   x = 1,036.76