Finding the Third Proportional to 30,601.50 and 64,877

Step by Step Solution

1. Step 1: Write the proportion equation
   30,601.50 : 64,877 = 64,877 : x
2. Step 2: Convert to fraction form
   30,601.50/64,877 = 64,877/x
3. Step 3: Cross multiply
   30,601.50x = 64,877 × 64,877
4. Step 4: Simplify right side
   30,601.50x = 4,209,025,129
5. Step 5: Solve for x
   x = 4,209,025,129/30,601.50
6. Step 6: Final answer
   x = 137,543.10