Finding the Third Proportional to 49,560 and 79,798.50

Step by Step Solution

1. Step 1: Write the proportion equation
   49,560 : 79,798.50 = 79,798.50 : x
2. Step 2: Convert to fraction form
   49,560/79,798.50 = 79,798.50/x
3. Step 3: Cross multiply
   49,560x = 79,798.50 × 79,798.50
4. Step 4: Simplify right side
   49,560x = 6,367,800,602.25
5. Step 5: Solve for x
   x = 6,367,800,602.25/49,560
6. Step 6: Final answer
   x = 128,486.69