Finding the Third Proportional to 191.43 and 491.72

Step by Step Solution

1. Step 1: Write the proportion equation
   191.43 : 491.72 = 491.72 : x
2. Step 2: Convert to fraction form
   191.43/491.72 = 491.72/x
3. Step 3: Cross multiply
   191.43x = 491.72 × 491.72
4. Step 4: Simplify right side
   191.43x = 241,790.17
5. Step 5: Solve for x
   x = 241,790.17/191.43
6. Step 6: Final answer
   x = 1,263.05