Finding the Third Proportional to 985,478 and 1,089,158

Step by Step Solution

1. Step 1: Write the proportion equation
   985,478 : 1,089,158 = 1,089,158 : x
2. Step 2: Convert to fraction form
   985,478/1,089,158 = 1,089,158/x
3. Step 3: Cross multiply
   985,478x = 1,089,158 × 1,089,158
4. Step 4: Simplify right side
   985,478x = 1,186,265,148,964
5. Step 5: Solve for x
   x = 1,186,265,148,964/985,478
6. Step 6: Final answer
   x = 1,203,745.95