Finding the Third Proportional to 1,990.41 and 4,345.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,990.41 : 4,345.31 = 4,345.31 : x
2. Step 2: Convert to fraction form
   1,990.41/4,345.31 = 4,345.31/x
3. Step 3: Cross multiply
   1,990.41x = 4,345.31 × 4,345.31
4. Step 4: Simplify right side
   1,990.41x = 18,881,740.72
5. Step 5: Solve for x
   x = 18,881,740.72/1,990.41
6. Step 6: Final answer
   x = 9,486.38