Finding the Third Proportional to 120,798 and 272,913.75

Step by Step Solution

1. Step 1: Write the proportion equation
   120,798 : 272,913.75 = 272,913.75 : x
2. Step 2: Convert to fraction form
   120,798/272,913.75 = 272,913.75/x
3. Step 3: Cross multiply
   120,798x = 272,913.75 × 272,913.75
4. Step 4: Simplify right side
   120,798x = 74,481,914,939.06
5. Step 5: Solve for x
   x = 74,481,914,939.06/120,798
6. Step 6: Final answer
   x = 616,582.35