Finding the Third Proportional to 70,872 and 105,391.50

Step by Step Solution

1. Step 1: Write the proportion equation
   70,872 : 105,391.50 = 105,391.50 : x
2. Step 2: Convert to fraction form
   70,872/105,391.50 = 105,391.50/x
3. Step 3: Cross multiply
   70,872x = 105,391.50 × 105,391.50
4. Step 4: Simplify right side
   70,872x = 11,107,368,272.25
5. Step 5: Solve for x
   x = 11,107,368,272.25/70,872
6. Step 6: Final answer
   x = 156,724.35