Finding the Third Proportional to 211,200 and 439,873.50

Step by Step Solution

1. Step 1: Write the proportion equation
   211,200 : 439,873.50 = 439,873.50 : x
2. Step 2: Convert to fraction form
   211,200/439,873.50 = 439,873.50/x
3. Step 3: Cross multiply
   211,200x = 439,873.50 × 439,873.50
4. Step 4: Simplify right side
   211,200x = 193,488,696,002.25
5. Step 5: Solve for x
   x = 193,488,696,002.25/211,200
6. Step 6: Final answer
   x = 916,139.66