Finding the Fourth Proportional to 1,308.86, 1,964.08 and 693.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.86 : 1,964.08 = 693.02 : x
2. Step 2: Convert to fraction form
   1,308.86/1,964.08 = 693.02/x
3. Step 3: Cross multiply
   1,308.86x = 1,964.08 × 693.02
4. Step 4: Simplify right side
   1,308.86x = 1,361,146.72
5. Step 5: Solve for x
   x = 1,361,146.72/1,308.86
6. Step 6: Final answer
   x = 1,039.95