Finding the Third Proportional to 72,186.19 and 103,054.78

Step by Step Solution

1. Step 1: Write the proportion equation
   72,186.19 : 103,054.78 = 103,054.78 : x
2. Step 2: Convert to fraction form
   72,186.19/103,054.78 = 103,054.78/x
3. Step 3: Cross multiply
   72,186.19x = 103,054.78 × 103,054.78
4. Step 4: Simplify right side
   72,186.19x = 10,620,287,938.49
5. Step 5: Solve for x
   x = 10,620,287,938.49/72,186.19
6. Step 6: Final answer
   x = 147,123.55