Finding the Fourth Proportional to 1,191.47, 1,643.73 and 693.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.47 : 1,643.73 = 693.86 : x
2. Step 2: Convert to fraction form
   1,191.47/1,643.73 = 693.86/x
3. Step 3: Cross multiply
   1,191.47x = 1,643.73 × 693.86
4. Step 4: Simplify right side
   1,191.47x = 1,140,518.50
5. Step 5: Solve for x
   x = 1,140,518.50/1,191.47
6. Step 6: Final answer
   x = 957.24