Finding the Third Proportional to 120,207 and 257,090.50

Step by Step Solution

1. Step 1: Write the proportion equation
   120,207 : 257,090.50 = 257,090.50 : x
2. Step 2: Convert to fraction form
   120,207/257,090.50 = 257,090.50/x
3. Step 3: Cross multiply
   120,207x = 257,090.50 × 257,090.50
4. Step 4: Simplify right side
   120,207x = 66,095,525,190.25
5. Step 5: Solve for x
   x = 66,095,525,190.25/120,207
6. Step 6: Final answer
   x = 549,847.56