Finding the Third Proportional to 276,840.50 and 427,066

Step by Step Solution

1. Step 1: Write the proportion equation
   276,840.50 : 427,066 = 427,066 : x
2. Step 2: Convert to fraction form
   276,840.50/427,066 = 427,066/x
3. Step 3: Cross multiply
   276,840.50x = 427,066 × 427,066
4. Step 4: Simplify right side
   276,840.50x = 182,385,368,356
5. Step 5: Solve for x
   x = 182,385,368,356/276,840.50
6. Step 6: Final answer
   x = 658,810.28