Finding the Third Proportional to 49,798 and 78,890

Step by Step Solution

1. Step 1: Write the proportion equation
   49,798 : 78,890 = 78,890 : x
2. Step 2: Convert to fraction form
   49,798/78,890 = 78,890/x
3. Step 3: Cross multiply
   49,798x = 78,890 × 78,890
4. Step 4: Simplify right side
   49,798x = 6,223,632,100
5. Step 5: Solve for x
   x = 6,223,632,100/49,798
6. Step 6: Final answer
   x = 124,977.55