Finding the Third Proportional to 222,116 and 316,560

Step by Step Solution

1. Step 1: Write the proportion equation
   222,116 : 316,560 = 316,560 : x
2. Step 2: Convert to fraction form
   222,116/316,560 = 316,560/x
3. Step 3: Cross multiply
   222,116x = 316,560 × 316,560
4. Step 4: Simplify right side
   222,116x = 100,210,233,600
5. Step 5: Solve for x
   x = 100,210,233,600/222,116
6. Step 6: Final answer
   x = 451,161.71