Finding the Third Proportional to 222,117 and 316,561.50

Step by Step Solution

1. Step 1: Write the proportion equation
   222,117 : 316,561.50 = 316,561.50 : x
2. Step 2: Convert to fraction form
   222,117/316,561.50 = 316,561.50/x
3. Step 3: Cross multiply
   222,117x = 316,561.50 × 316,561.50
4. Step 4: Simplify right side
   222,117x = 100,211,183,282.25
5. Step 5: Solve for x
   x = 100,211,183,282.25/222,117
6. Step 6: Final answer
   x = 451,163.95