Finding the Fourth Proportional to 1,106.72, 1,527.28 and 634.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,106.72 : 1,527.28 = 634.65 : x
2. Step 2: Convert to fraction form
   1,106.72/1,527.28 = 634.65/x
3. Step 3: Cross multiply
   1,106.72x = 1,527.28 × 634.65
4. Step 4: Simplify right side
   1,106.72x = 969,287.55
5. Step 5: Solve for x
   x = 969,287.55/1,106.72
6. Step 6: Final answer
   x = 875.82