Finding the Third Proportional to 42,409.59 and 84,814.69

Step by Step Solution

1. Step 1: Write the proportion equation
   42,409.59 : 84,814.69 = 84,814.69 : x
2. Step 2: Convert to fraction form
   42,409.59/84,814.69 = 84,814.69/x
3. Step 3: Cross multiply
   42,409.59x = 84,814.69 × 84,814.69
4. Step 4: Simplify right side
   42,409.59x = 7,193,531,215.72
5. Step 5: Solve for x
   x = 7,193,531,215.72/42,409.59
6. Step 6: Final answer
   x = 169,620.38