Finding the Third Proportional to 1,003 and 2,138.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003 : 2,138.50 = 2,138.50 : x
2. Step 2: Convert to fraction form
   1,003/2,138.50 = 2,138.50/x
3. Step 3: Cross multiply
   1,003x = 2,138.50 × 2,138.50
4. Step 4: Simplify right side
   1,003x = 4,573,182.25
5. Step 5: Solve for x
   x = 4,573,182.25/1,003
6. Step 6: Final answer
   x = 4,559.50