Finding the Third Proportional to 54,659.81 and 131,561.72

Step by Step Solution

1. Step 1: Write the proportion equation
   54,659.81 : 131,561.72 = 131,561.72 : x
2. Step 2: Convert to fraction form
   54,659.81/131,561.72 = 131,561.72/x
3. Step 3: Cross multiply
   54,659.81x = 131,561.72 × 131,561.72
4. Step 4: Simplify right side
   54,659.81x = 17,308,485,840.45
5. Step 5: Solve for x
   x = 17,308,485,840.45/54,659.81
6. Step 6: Final answer
   x = 316,658.35