Finding the Third Proportional to 1,288.50 and 1,840.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,288.50 : 1,840.88 = 1,840.88 : x
2. Step 2: Convert to fraction form
   1,288.50/1,840.88 = 1,840.88/x
3. Step 3: Cross multiply
   1,288.50x = 1,840.88 × 1,840.88
4. Step 4: Simplify right side
   1,288.50x = 3,388,820.77
5. Step 5: Solve for x
   x = 3,388,820.77/1,288.50
6. Step 6: Final answer
   x = 2,630.05