Finding the Third Proportional to 61,119.56 and 128,876.06

Step by Step Solution

1. Step 1: Write the proportion equation
   61,119.56 : 128,876.06 = 128,876.06 : x
2. Step 2: Convert to fraction form
   61,119.56/128,876.06 = 128,876.06/x
3. Step 3: Cross multiply
   61,119.56x = 128,876.06 × 128,876.06
4. Step 4: Simplify right side
   61,119.56x = 16,609,039,485.50
5. Step 5: Solve for x
   x = 16,609,039,485.50/61,119.56
6. Step 6: Final answer
   x = 271,746.70