Finding the Third Proportional to 128,961 and 274,528.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,961 : 274,528.50 = 274,528.50 : x
2. Step 2: Convert to fraction form
   128,961/274,528.50 = 274,528.50/x
3. Step 3: Cross multiply
   128,961x = 274,528.50 × 274,528.50
4. Step 4: Simplify right side
   128,961x = 75,365,897,312.25
5. Step 5: Solve for x
   x = 75,365,897,312.25/128,961
6. Step 6: Final answer
   x = 584,408.44