Finding the Third Proportional to 120,826.50 and 272,988

Step by Step Solution

1. Step 1: Write the proportion equation
   120,826.50 : 272,988 = 272,988 : x
2. Step 2: Convert to fraction form
   120,826.50/272,988 = 272,988/x
3. Step 3: Cross multiply
   120,826.50x = 272,988 × 272,988
4. Step 4: Simplify right side
   120,826.50x = 74,522,448,144
5. Step 5: Solve for x
   x = 74,522,448,144/120,826.50
6. Step 6: Final answer
   x = 616,772.38