Finding the Third Proportional to 66,898.50 and 91,120.50

Step by Step Solution

1. Step 1: Write the proportion equation
   66,898.50 : 91,120.50 = 91,120.50 : x
2. Step 2: Convert to fraction form
   66,898.50/91,120.50 = 91,120.50/x
3. Step 3: Cross multiply
   66,898.50x = 91,120.50 × 91,120.50
4. Step 4: Simplify right side
   66,898.50x = 8,302,945,520.25
5. Step 5: Solve for x
   x = 8,302,945,520.25/66,898.50
6. Step 6: Final answer
   x = 124,112.58