Finding the Fourth Proportional to 1,438.62, 1,986.05 and 968.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,438.62 : 1,986.05 = 968.99 : x
2. Step 2: Convert to fraction form
   1,438.62/1,986.05 = 968.99/x
3. Step 3: Cross multiply
   1,438.62x = 1,986.05 × 968.99
4. Step 4: Simplify right side
   1,438.62x = 1,924,462.59
5. Step 5: Solve for x
   x = 1,924,462.59/1,438.62
6. Step 6: Final answer
   x = 1,337.71