Finding the Fourth Proportional to 1,134.15, 1,698.49 and 645.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,134.15 : 1,698.49 = 645.72 : x
2. Step 2: Convert to fraction form
   1,134.15/1,698.49 = 645.72/x
3. Step 3: Cross multiply
   1,134.15x = 1,698.49 × 645.72
4. Step 4: Simplify right side
   1,134.15x = 1,096,748.96
5. Step 5: Solve for x
   x = 1,096,748.96/1,134.15
6. Step 6: Final answer
   x = 967.02