Finding the Third Proportional to 54,234.56 and 79,688.81

Step by Step Solution

1. Step 1: Write the proportion equation
   54,234.56 : 79,688.81 = 79,688.81 : x
2. Step 2: Convert to fraction form
   54,234.56/79,688.81 = 79,688.81/x
3. Step 3: Cross multiply
   54,234.56x = 79,688.81 × 79,688.81
4. Step 4: Simplify right side
   54,234.56x = 6,350,306,837.66
5. Step 5: Solve for x
   x = 6,350,306,837.66/54,234.56
6. Step 6: Final answer
   x = 117,089.67