Finding the Third Proportional to 191,115 and 417,222

Step by Step Solution

1. Step 1: Write the proportion equation
   191,115 : 417,222 = 417,222 : x
2. Step 2: Convert to fraction form
   191,115/417,222 = 417,222/x
3. Step 3: Cross multiply
   191,115x = 417,222 × 417,222
4. Step 4: Simplify right side
   191,115x = 174,074,197,284
5. Step 5: Solve for x
   x = 174,074,197,284/191,115
6. Step 6: Final answer
   x = 910,834.82