Finding the Fourth Proportional to 1,179.42, 1,627.50 and 681.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,179.42 : 1,627.50 = 681.72 : x
2. Step 2: Convert to fraction form
   1,179.42/1,627.50 = 681.72/x
3. Step 3: Cross multiply
   1,179.42x = 1,627.50 × 681.72
4. Step 4: Simplify right side
   1,179.42x = 1,109,499.30
5. Step 5: Solve for x
   x = 1,109,499.30/1,179.42
6. Step 6: Final answer
   x = 940.72