Finding the Third Proportional to 121,100 and 262,611.50

Step by Step Solution

1. Step 1: Write the proportion equation
   121,100 : 262,611.50 = 262,611.50 : x
2. Step 2: Convert to fraction form
   121,100/262,611.50 = 262,611.50/x
3. Step 3: Cross multiply
   121,100x = 262,611.50 × 262,611.50
4. Step 4: Simplify right side
   121,100x = 68,964,799,932.25
5. Step 5: Solve for x
   x = 68,964,799,932.25/121,100
6. Step 6: Final answer
   x = 569,486.37