Finding the Fourth Proportional to 1,179.68, 1,627.56 and 707.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,179.68 : 1,627.56 = 707.72 : x
2. Step 2: Convert to fraction form
   1,179.68/1,627.56 = 707.72/x
3. Step 3: Cross multiply
   1,179.68x = 1,627.56 × 707.72
4. Step 4: Simplify right side
   1,179.68x = 1,151,856.76
5. Step 5: Solve for x
   x = 1,151,856.76/1,179.68
6. Step 6: Final answer
   x = 976.41