Finding the Fourth Proportional to 1,107.15, 1,527.82 and 634.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,107.15 : 1,527.82 = 634.72 : x
2. Step 2: Convert to fraction form
   1,107.15/1,527.82 = 634.72/x
3. Step 3: Cross multiply
   1,107.15x = 1,527.82 × 634.72
4. Step 4: Simplify right side
   1,107.15x = 969,732.59
5. Step 5: Solve for x
   x = 969,732.59/1,107.15
6. Step 6: Final answer
   x = 875.88