Finding the Third Proportional to 1,913 and 4,185.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,913 : 4,185.50 = 4,185.50 : x
2. Step 2: Convert to fraction form
   1,913/4,185.50 = 4,185.50/x
3. Step 3: Cross multiply
   1,913x = 4,185.50 × 4,185.50
4. Step 4: Simplify right side
   1,913x = 17,518,410.25
5. Step 5: Solve for x
   x = 17,518,410.25/1,913
6. Step 6: Final answer
   x = 9,157.56