Finding the Fourth Proportional to 1,071.32, 1,478.81 and 693.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,071.32 : 1,478.81 = 693.73 : x
2. Step 2: Convert to fraction form
   1,071.32/1,478.81 = 693.73/x
3. Step 3: Cross multiply
   1,071.32x = 1,478.81 × 693.73
4. Step 4: Simplify right side
   1,071.32x = 1,025,894.86
5. Step 5: Solve for x
   x = 1,025,894.86/1,071.32
6. Step 6: Final answer
   x = 957.60