Finding the Fourth Proportional to 959.94, 1,438.55 and 742.50

Step by Step Solution

1. Step 1: Write the proportion equation
   959.94 : 1,438.55 = 742.50 : x
2. Step 2: Convert to fraction form
   959.94/1,438.55 = 742.50/x
3. Step 3: Cross multiply
   959.94x = 1,438.55 × 742.50
4. Step 4: Simplify right side
   959.94x = 1,068,123.38
5. Step 5: Solve for x
   x = 1,068,123.38/959.94
6. Step 6: Final answer
   x = 1,112.70