Finding the Third Proportional to 587,870 and 859,121.50

Step by Step Solution

1. Step 1: Write the proportion equation
   587,870 : 859,121.50 = 859,121.50 : x
2. Step 2: Convert to fraction form
   587,870/859,121.50 = 859,121.50/x
3. Step 3: Cross multiply
   587,870x = 859,121.50 × 859,121.50
4. Step 4: Simplify right side
   587,870x = 738,089,751,762.25
5. Step 5: Solve for x
   x = 738,089,751,762.25/587,870
6. Step 6: Final answer
   x = 1,255,532.26