Finding the Third Proportional to 30,418 and 65,038.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,418 : 65,038.50 = 65,038.50 : x
2. Step 2: Convert to fraction form
   30,418/65,038.50 = 65,038.50/x
3. Step 3: Cross multiply
   30,418x = 65,038.50 × 65,038.50
4. Step 4: Simplify right side
   30,418x = 4,230,006,482.25
5. Step 5: Solve for x
   x = 4,230,006,482.25/30,418
6. Step 6: Final answer
   x = 139,062.61