Finding the Third Proportional to 61,272.38 and 128,155.88

Step by Step Solution

1. Step 1: Write the proportion equation
   61,272.38 : 128,155.88 = 128,155.88 : x
2. Step 2: Convert to fraction form
   61,272.38/128,155.88 = 128,155.88/x
3. Step 3: Cross multiply
   61,272.38x = 128,155.88 × 128,155.88
4. Step 4: Simplify right side
   61,272.38x = 16,423,928,297.02
5. Step 5: Solve for x
   x = 16,423,928,297.02/61,272.38
6. Step 6: Final answer
   x = 268,047.85