Finding the Third Proportional to 78,156.56 and 121,096.69

Step by Step Solution

1. Step 1: Write the proportion equation
   78,156.56 : 121,096.69 = 121,096.69 : x
2. Step 2: Convert to fraction form
   78,156.56/121,096.69 = 121,096.69/x
3. Step 3: Cross multiply
   78,156.56x = 121,096.69 × 121,096.69
4. Step 4: Simplify right side
   78,156.56x = 14,664,407,723.47
5. Step 5: Solve for x
   x = 14,664,407,723.47/78,156.56
6. Step 6: Final answer
   x = 187,628.62