Finding the Third Proportional to 53,679.38 and 78,671.25

Step by Step Solution

1. Step 1: Write the proportion equation
   53,679.38 : 78,671.25 = 78,671.25 : x
2. Step 2: Convert to fraction form
   53,679.38/78,671.25 = 78,671.25/x
3. Step 3: Cross multiply
   53,679.38x = 78,671.25 × 78,671.25
4. Step 4: Simplify right side
   53,679.38x = 6,189,165,576.56
5. Step 5: Solve for x
   x = 6,189,165,576.56/53,679.38
6. Step 6: Final answer
   x = 115,298.76