Finding the Third Proportional to 38,624.34 and 55,128.09

Step by Step Solution

1. Step 1: Write the proportion equation
   38,624.34 : 55,128.09 = 55,128.09 : x
2. Step 2: Convert to fraction form
   38,624.34/55,128.09 = 55,128.09/x
3. Step 3: Cross multiply
   38,624.34x = 55,128.09 × 55,128.09
4. Step 4: Simplify right side
   38,624.34x = 3,039,106,720.51
5. Step 5: Solve for x
   x = 3,039,106,720.51/38,624.34
6. Step 6: Final answer
   x = 78,683.71