Finding the Third Proportional to 42,607.69 and 89,709.19

Step by Step Solution

1. Step 1: Write the proportion equation
   42,607.69 : 89,709.19 = 89,709.19 : x
2. Step 2: Convert to fraction form
   42,607.69/89,709.19 = 89,709.19/x
3. Step 3: Cross multiply
   42,607.69x = 89,709.19 × 89,709.19
4. Step 4: Simplify right side
   42,607.69x = 8,047,738,321.91
5. Step 5: Solve for x
   x = 8,047,738,321.91/42,607.69
6. Step 6: Final answer
   x = 188,879.96