Finding the Third Proportional to 111,216 and 262,428.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,216 : 262,428.50 = 262,428.50 : x
2. Step 2: Convert to fraction form
   111,216/262,428.50 = 262,428.50/x
3. Step 3: Cross multiply
   111,216x = 262,428.50 × 262,428.50
4. Step 4: Simplify right side
   111,216x = 68,868,717,612.25
5. Step 5: Solve for x
   x = 68,868,717,612.25/111,216
6. Step 6: Final answer
   x = 619,233.90