Finding the Fourth Proportional to 1,179.76, 1,628.15 and 707.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,179.76 : 1,628.15 = 707.67 : x
2. Step 2: Convert to fraction form
   1,179.76/1,628.15 = 707.67/x
3. Step 3: Cross multiply
   1,179.76x = 1,628.15 × 707.67
4. Step 4: Simplify right side
   1,179.76x = 1,152,192.83
5. Step 5: Solve for x
   x = 1,152,192.83/1,179.76
6. Step 6: Final answer
   x = 976.64