Finding the Third Proportional to 64,615 and 137,047

Step by Step Solution

1. Step 1: Write the proportion equation
   64,615 : 137,047 = 137,047 : x
2. Step 2: Convert to fraction form
   64,615/137,047 = 137,047/x
3. Step 3: Cross multiply
   64,615x = 137,047 × 137,047
4. Step 4: Simplify right side
   64,615x = 18,781,880,209
5. Step 5: Solve for x
   x = 18,781,880,209/64,615
6. Step 6: Final answer
   x = 290,673.69