Finding the Third Proportional to 121,130 and 169,739.50

Step by Step Solution

1. Step 1: Write the proportion equation
   121,130 : 169,739.50 = 169,739.50 : x
2. Step 2: Convert to fraction form
   121,130/169,739.50 = 169,739.50/x
3. Step 3: Cross multiply
   121,130x = 169,739.50 × 169,739.50
4. Step 4: Simplify right side
   121,130x = 28,811,497,860.25
5. Step 5: Solve for x
   x = 28,811,497,860.25/121,130
6. Step 6: Final answer
   x = 237,856.00