Finding the Third Proportional to 186,912 and 405,373.50

Step by Step Solution

1. Step 1: Write the proportion equation
   186,912 : 405,373.50 = 405,373.50 : x
2. Step 2: Convert to fraction form
   186,912/405,373.50 = 405,373.50/x
3. Step 3: Cross multiply
   186,912x = 405,373.50 × 405,373.50
4. Step 4: Simplify right side
   186,912x = 164,327,674,502.25
5. Step 5: Solve for x
   x = 164,327,674,502.25/186,912
6. Step 6: Final answer
   x = 879,171.35