Finding the Third Proportional to 517,440 and 784,907.50

Step by Step Solution

1. Step 1: Write the proportion equation
   517,440 : 784,907.50 = 784,907.50 : x
2. Step 2: Convert to fraction form
   517,440/784,907.50 = 784,907.50/x
3. Step 3: Cross multiply
   517,440x = 784,907.50 × 784,907.50
4. Step 4: Simplify right side
   517,440x = 616,079,783,556.25
5. Step 5: Solve for x
   x = 616,079,783,556.25/517,440
6. Step 6: Final answer
   x = 1,190,630.38