Finding the Third Proportional to 30,155.50 and 64,318.63

Step by Step Solution

1. Step 1: Write the proportion equation
   30,155.50 : 64,318.63 = 64,318.63 : x
2. Step 2: Convert to fraction form
   30,155.50/64,318.63 = 64,318.63/x
3. Step 3: Cross multiply
   30,155.50x = 64,318.63 × 64,318.63
4. Step 4: Simplify right side
   30,155.50x = 4,136,885,521.89
5. Step 5: Solve for x
   x = 4,136,885,521.89/30,155.50
6. Step 6: Final answer
   x = 137,185.11