Finding the Fourth Proportional to 978.89, 1,468.33 and 634.43

Step by Step Solution

1. Step 1: Write the proportion equation
   978.89 : 1,468.33 = 634.43 : x
2. Step 2: Convert to fraction form
   978.89/1,468.33 = 634.43/x
3. Step 3: Cross multiply
   978.89x = 1,468.33 × 634.43
4. Step 4: Simplify right side
   978.89x = 931,554.69
5. Step 5: Solve for x
   x = 931,554.69/978.89
6. Step 6: Final answer
   x = 951.65