Finding the Fourth Proportional to 1,167.92, 1,611.76 and 670.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,167.92 : 1,611.76 = 670.72 : x
2. Step 2: Convert to fraction form
   1,167.92/1,611.76 = 670.72/x
3. Step 3: Cross multiply
   1,167.92x = 1,611.76 × 670.72
4. Step 4: Simplify right side
   1,167.92x = 1,081,039.67
5. Step 5: Solve for x
   x = 1,081,039.67/1,167.92
6. Step 6: Final answer
   x = 925.61