Finding the Third Proportional to 35,439 and 72,516

Step by Step Solution

1. Step 1: Write the proportion equation
   35,439 : 72,516 = 72,516 : x
2. Step 2: Convert to fraction form
   35,439/72,516 = 72,516/x
3. Step 3: Cross multiply
   35,439x = 72,516 × 72,516
4. Step 4: Simplify right side
   35,439x = 5,258,570,256
5. Step 5: Solve for x
   x = 5,258,570,256/35,439
6. Step 6: Final answer
   x = 148,383.71