Finding the Third Proportional to 71,712 and 105,491.50

Step by Step Solution

1. Step 1: Write the proportion equation
   71,712 : 105,491.50 = 105,491.50 : x
2. Step 2: Convert to fraction form
   71,712/105,491.50 = 105,491.50/x
3. Step 3: Cross multiply
   71,712x = 105,491.50 × 105,491.50
4. Step 4: Simplify right side
   71,712x = 11,128,456,572.25
5. Step 5: Solve for x
   x = 11,128,456,572.25/71,712
6. Step 6: Final answer
   x = 155,182.63