Finding the Fourth Proportional to 1,679.52, 2,318.82 and 1,091.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,679.52 : 2,318.82 = 1,091.72 : x
2. Step 2: Convert to fraction form
   1,679.52/2,318.82 = 1,091.72/x
3. Step 3: Cross multiply
   1,679.52x = 2,318.82 × 1,091.72
4. Step 4: Simplify right side
   1,679.52x = 2,531,502.17
5. Step 5: Solve for x
   x = 2,531,502.17/1,679.52
6. Step 6: Final answer
   x = 1,507.28