Finding the Third Proportional to 555,099.75 and 830,412

Step by Step Solution

1. Step 1: Write the proportion equation
   555,099.75 : 830,412 = 830,412 : x
2. Step 2: Convert to fraction form
   555,099.75/830,412 = 830,412/x
3. Step 3: Cross multiply
   555,099.75x = 830,412 × 830,412
4. Step 4: Simplify right side
   555,099.75x = 689,584,089,744
5. Step 5: Solve for x
   x = 689,584,089,744/555,099.75
6. Step 6: Final answer
   x = 1,242,270.58