Finding the Third Proportional to 259,492.78 and 561,632.91

Step by Step Solution

1. Step 1: Write the proportion equation
   259,492.78 : 561,632.91 = 561,632.91 : x
2. Step 2: Convert to fraction form
   259,492.78/561,632.91 = 561,632.91/x
3. Step 3: Cross multiply
   259,492.78x = 561,632.91 × 561,632.91
4. Step 4: Simplify right side
   259,492.78x = 315,431,521,382.82
5. Step 5: Solve for x
   x = 315,431,521,382.82/259,492.78
6. Step 6: Final answer
   x = 1,215,569.54