Finding the Third Proportional to 678,019.50 and 920,835

Step by Step Solution

1. Step 1: Write the proportion equation
   678,019.50 : 920,835 = 920,835 : x
2. Step 2: Convert to fraction form
   678,019.50/920,835 = 920,835/x
3. Step 3: Cross multiply
   678,019.50x = 920,835 × 920,835
4. Step 4: Simplify right side
   678,019.50x = 847,937,097,225
5. Step 5: Solve for x
   x = 847,937,097,225/678,019.50
6. Step 6: Final answer
   x = 1,250,608.72