Finding the Third Proportional to 191,400 and 417,240

Step by Step Solution

1. Step 1: Write the proportion equation
   191,400 : 417,240 = 417,240 : x
2. Step 2: Convert to fraction form
   191,400/417,240 = 417,240/x
3. Step 3: Cross multiply
   191,400x = 417,240 × 417,240
4. Step 4: Simplify right side
   191,400x = 174,089,217,600
5. Step 5: Solve for x
   x = 174,089,217,600/191,400
6. Step 6: Final answer
   x = 909,557.04