Finding the Fourth Proportional to 978.01, 1,468.64 and 935.89

Step by Step Solution

1. Step 1: Write the proportion equation
   978.01 : 1,468.64 = 935.89 : x
2. Step 2: Convert to fraction form
   978.01/1,468.64 = 935.89/x
3. Step 3: Cross multiply
   978.01x = 1,468.64 × 935.89
4. Step 4: Simplify right side
   978.01x = 1,374,485.49
5. Step 5: Solve for x
   x = 1,374,485.49/978.01
6. Step 6: Final answer
   x = 1,405.39