Finding the Third Proportional to 80,458,680 and 120,688,081.50

Step by Step Solution

1. Step 1: Write the proportion equation
   80,458,680 : 120,688,081.50 = 120,688,081.50 : x
2. Step 2: Convert to fraction form
   80,458,680/120,688,081.50 = 120,688,081.50/x
3. Step 3: Cross multiply
   80,458,680x = 120,688,081.50 × 120,688,081.50
4. Step 4: Simplify right side
   80,458,680x = 14,565,613,016,150,642
5. Step 5: Solve for x
   x = 14,565,613,016,150,642/80,458,680
6. Step 6: Final answer
   x = 181,032,214.50