Finding the Third Proportional to 173,785.50 and 405,990

Step by Step Solution

1. Step 1: Write the proportion equation
   173,785.50 : 405,990 = 405,990 : x
2. Step 2: Convert to fraction form
   173,785.50/405,990 = 405,990/x
3. Step 3: Cross multiply
   173,785.50x = 405,990 × 405,990
4. Step 4: Simplify right side
   173,785.50x = 164,827,880,100
5. Step 5: Solve for x
   x = 164,827,880,100/173,785.50
6. Step 6: Final answer
   x = 948,455.88