Finding the Third Proportional to 285,061.50 and 619,739

Step by Step Solution

1. Step 1: Write the proportion equation
   285,061.50 : 619,739 = 619,739 : x
2. Step 2: Convert to fraction form
   285,061.50/619,739 = 619,739/x
3. Step 3: Cross multiply
   285,061.50x = 619,739 × 619,739
4. Step 4: Simplify right side
   285,061.50x = 384,076,428,121
5. Step 5: Solve for x
   x = 384,076,428,121/285,061.50
6. Step 6: Final answer
   x = 1,347,345.85