Finding the Third Proportional to 51,341 and 78,865.50

Step by Step Solution

1. Step 1: Write the proportion equation
   51,341 : 78,865.50 = 78,865.50 : x
2. Step 2: Convert to fraction form
   51,341/78,865.50 = 78,865.50/x
3. Step 3: Cross multiply
   51,341x = 78,865.50 × 78,865.50
4. Step 4: Simplify right side
   51,341x = 6,219,767,090.25
5. Step 5: Solve for x
   x = 6,219,767,090.25/51,341
6. Step 6: Final answer
   x = 121,146.20