Finding the Third Proportional to 1,312.88 and 1,891.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,312.88 : 1,891.69 = 1,891.69 : x
2. Step 2: Convert to fraction form
   1,312.88/1,891.69 = 1,891.69/x
3. Step 3: Cross multiply
   1,312.88x = 1,891.69 × 1,891.69
4. Step 4: Simplify right side
   1,312.88x = 3,578,481.60
5. Step 5: Solve for x
   x = 3,578,481.60/1,312.88
6. Step 6: Final answer
   x = 2,725.68