Finding the Third Proportional to 231,120 and 355,090.50

Step by Step Solution

1. Step 1: Write the proportion equation
   231,120 : 355,090.50 = 355,090.50 : x
2. Step 2: Convert to fraction form
   231,120/355,090.50 = 355,090.50/x
3. Step 3: Cross multiply
   231,120x = 355,090.50 × 355,090.50
4. Step 4: Simplify right side
   231,120x = 126,089,263,190.25
5. Step 5: Solve for x
   x = 126,089,263,190.25/231,120
6. Step 6: Final answer
   x = 545,557.56