Finding the Fourth Proportional to 2,136.32, 3,204.72 and 981.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,136.32 : 3,204.72 = 981.92 : x
2. Step 2: Convert to fraction form
   2,136.32/3,204.72 = 981.92/x
3. Step 3: Cross multiply
   2,136.32x = 3,204.72 × 981.92
4. Step 4: Simplify right side
   2,136.32x = 3,146,778.66
5. Step 5: Solve for x
   x = 3,146,778.66/2,136.32
6. Step 6: Final answer
   x = 1,472.99