Finding the Third Proportional to 66,907.50 and 91,747.50

Step by Step Solution

1. Step 1: Write the proportion equation
   66,907.50 : 91,747.50 = 91,747.50 : x
2. Step 2: Convert to fraction form
   66,907.50/91,747.50 = 91,747.50/x
3. Step 3: Cross multiply
   66,907.50x = 91,747.50 × 91,747.50
4. Step 4: Simplify right side
   66,907.50x = 8,417,603,756.25
5. Step 5: Solve for x
   x = 8,417,603,756.25/66,907.50
6. Step 6: Final answer
   x = 125,809.57