Finding the Third Proportional to 71,479.50 and 105,139.50

Step by Step Solution

1. Step 1: Write the proportion equation
   71,479.50 : 105,139.50 = 105,139.50 : x
2. Step 2: Convert to fraction form
   71,479.50/105,139.50 = 105,139.50/x
3. Step 3: Cross multiply
   71,479.50x = 105,139.50 × 105,139.50
4. Step 4: Simplify right side
   71,479.50x = 11,054,314,460.25
5. Step 5: Solve for x
   x = 11,054,314,460.25/71,479.50
6. Step 6: Final answer
   x = 154,650.14