Finding the Third Proportional to 30,389.50 and 45,990

Step by Step Solution

1. Step 1: Write the proportion equation
   30,389.50 : 45,990 = 45,990 : x
2. Step 2: Convert to fraction form
   30,389.50/45,990 = 45,990/x
3. Step 3: Cross multiply
   30,389.50x = 45,990 × 45,990
4. Step 4: Simplify right side
   30,389.50x = 2,115,080,100
5. Step 5: Solve for x
   x = 2,115,080,100/30,389.50
6. Step 6: Final answer
   x = 69,599.04