Finding the Third Proportional to 186,931.69 and 405,412.88

Step by Step Solution

1. Step 1: Write the proportion equation
   186,931.69 : 405,412.88 = 405,412.88 : x
2. Step 2: Convert to fraction form
   186,931.69/405,412.88 = 405,412.88/x
3. Step 3: Cross multiply
   186,931.69x = 405,412.88 × 405,412.88
4. Step 4: Simplify right side
   186,931.69x = 164,359,599,215.77
5. Step 5: Solve for x
   x = 164,359,599,215.77/186,931.69
6. Step 6: Final answer
   x = 879,249.53