Finding the Fourth Proportional to 1,434.50, 1,978.53 and 993.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.50 : 1,978.53 = 993.14 : x
2. Step 2: Convert to fraction form
   1,434.50/1,978.53 = 993.14/x
3. Step 3: Cross multiply
   1,434.50x = 1,978.53 × 993.14
4. Step 4: Simplify right side
   1,434.50x = 1,964,957.28
5. Step 5: Solve for x
   x = 1,964,957.28/1,434.50
6. Step 6: Final answer
   x = 1,369.79