Finding the Third Proportional to 111,390 and 228,683.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,390 : 228,683.50 = 228,683.50 : x
2. Step 2: Convert to fraction form
   111,390/228,683.50 = 228,683.50/x
3. Step 3: Cross multiply
   111,390x = 228,683.50 × 228,683.50
4. Step 4: Simplify right side
   111,390x = 52,296,143,172.25
5. Step 5: Solve for x
   x = 52,296,143,172.25/111,390
6. Step 6: Final answer
   x = 469,486.88