Finding the Third Proportional to 39,688 and 53,900.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,688 : 53,900.50 = 53,900.50 : x
2. Step 2: Convert to fraction form
   39,688/53,900.50 = 53,900.50/x
3. Step 3: Cross multiply
   39,688x = 53,900.50 × 53,900.50
4. Step 4: Simplify right side
   39,688x = 2,905,263,900.25
5. Step 5: Solve for x
   x = 2,905,263,900.25/39,688
6. Step 6: Final answer
   x = 73,202.58