Finding the Third Proportional to 98,172.56 and 144,139.78

Step by Step Solution

1. Step 1: Write the proportion equation
   98,172.56 : 144,139.78 = 144,139.78 : x
2. Step 2: Convert to fraction form
   98,172.56/144,139.78 = 144,139.78/x
3. Step 3: Cross multiply
   98,172.56x = 144,139.78 × 144,139.78
4. Step 4: Simplify right side
   98,172.56x = 20,776,276,538.80
5. Step 5: Solve for x
   x = 20,776,276,538.80/98,172.56
6. Step 6: Final answer
   x = 211,630.17