Finding the Third Proportional to 69,438.50 and 91,923.50

Step by Step Solution

1. Step 1: Write the proportion equation
   69,438.50 : 91,923.50 = 91,923.50 : x
2. Step 2: Convert to fraction form
   69,438.50/91,923.50 = 91,923.50/x
3. Step 3: Cross multiply
   69,438.50x = 91,923.50 × 91,923.50
4. Step 4: Simplify right side
   69,438.50x = 8,449,929,852.25
5. Step 5: Solve for x
   x = 8,449,929,852.25/69,438.50
6. Step 6: Final answer
   x = 121,689.41