Finding the Third Proportional to 30,155.50 and 64,318.75

Step by Step Solution

1. Step 1: Write the proportion equation
   30,155.50 : 64,318.75 = 64,318.75 : x
2. Step 2: Convert to fraction form
   30,155.50/64,318.75 = 64,318.75/x
3. Step 3: Cross multiply
   30,155.50x = 64,318.75 × 64,318.75
4. Step 4: Simplify right side
   30,155.50x = 4,136,901,601.56
5. Step 5: Solve for x
   x = 4,136,901,601.56/30,155.50
6. Step 6: Final answer
   x = 137,185.64