Finding the Third Proportional to 66,889.69 and 91,722.84

Step by Step Solution

1. Step 1: Write the proportion equation
   66,889.69 : 91,722.84 = 91,722.84 : x
2. Step 2: Convert to fraction form
   66,889.69/91,722.84 = 91,722.84/x
3. Step 3: Cross multiply
   66,889.69x = 91,722.84 × 91,722.84
4. Step 4: Simplify right side
   66,889.69x = 8,413,080,065.59
5. Step 5: Solve for x
   x = 8,413,080,065.59/66,889.69
6. Step 6: Final answer
   x = 125,775.44