Finding the Third Proportional to 51,610.21 and 78,128.92

Step by Step Solution

1. Step 1: Write the proportion equation
   51,610.21 : 78,128.92 = 78,128.92 : x
2. Step 2: Convert to fraction form
   51,610.21/78,128.92 = 78,128.92/x
3. Step 3: Cross multiply
   51,610.21x = 78,128.92 × 78,128.92
4. Step 4: Simplify right side
   51,610.21x = 6,104,128,109.09
5. Step 5: Solve for x
   x = 6,104,128,109.09/51,610.21
6. Step 6: Final answer
   x = 118,273.65