Finding the Third Proportional to 61,639.50 and 90,263.25

Step by Step Solution

1. Step 1: Write the proportion equation
   61,639.50 : 90,263.25 = 90,263.25 : x
2. Step 2: Convert to fraction form
   61,639.50/90,263.25 = 90,263.25/x
3. Step 3: Cross multiply
   61,639.50x = 90,263.25 × 90,263.25
4. Step 4: Simplify right side
   61,639.50x = 8,147,454,300.56
5. Step 5: Solve for x
   x = 8,147,454,300.56/61,639.50
6. Step 6: Final answer
   x = 132,179.11