Finding the Third Proportional to 361,121 and 561,787.50

Step by Step Solution

1. Step 1: Write the proportion equation
   361,121 : 561,787.50 = 561,787.50 : x
2. Step 2: Convert to fraction form
   361,121/561,787.50 = 561,787.50/x
3. Step 3: Cross multiply
   361,121x = 561,787.50 × 561,787.50
4. Step 4: Simplify right side
   361,121x = 315,605,195,156.25
5. Step 5: Solve for x
   x = 315,605,195,156.25/361,121
6. Step 6: Final answer
   x = 873,959.68