Finding the Third Proportional to 1,288.09 and 1,957.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,288.09 : 1,957.76 = 1,957.76 : x
2. Step 2: Convert to fraction form
   1,288.09/1,957.76 = 1,957.76/x
3. Step 3: Cross multiply
   1,288.09x = 1,957.76 × 1,957.76
4. Step 4: Simplify right side
   1,288.09x = 3,832,838.59
5. Step 5: Solve for x
   x = 3,832,838.59/1,288.09
6. Step 6: Final answer
   x = 2,975.60