Finding the Third Proportional to 211,440 and 440,374.50

Step by Step Solution

1. Step 1: Write the proportion equation
   211,440 : 440,374.50 = 440,374.50 : x
2. Step 2: Convert to fraction form
   211,440/440,374.50 = 440,374.50/x
3. Step 3: Cross multiply
   211,440x = 440,374.50 × 440,374.50
4. Step 4: Simplify right side
   211,440x = 193,929,700,250.25
5. Step 5: Solve for x
   x = 193,929,700,250.25/211,440
6. Step 6: Final answer
   x = 917,185.49