Finding the Fourth Proportional to 1,191.32, 1,643.86 and 693.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.32 : 1,643.86 = 693.84 : x
2. Step 2: Convert to fraction form
   1,191.32/1,643.86 = 693.84/x
3. Step 3: Cross multiply
   1,191.32x = 1,643.86 × 693.84
4. Step 4: Simplify right side
   1,191.32x = 1,140,575.82
5. Step 5: Solve for x
   x = 1,140,575.82/1,191.32
6. Step 6: Final answer
   x = 957.41