Finding the Third Proportional to 657,642 and 986,458.50

Step by Step Solution

1. Step 1: Write the proportion equation
   657,642 : 986,458.50 = 986,458.50 : x
2. Step 2: Convert to fraction form
   657,642/986,458.50 = 986,458.50/x
3. Step 3: Cross multiply
   657,642x = 986,458.50 × 986,458.50
4. Step 4: Simplify right side
   657,642x = 973,100,372,222.25
5. Step 5: Solve for x
   x = 973,100,372,222.25/657,642
6. Step 6: Final answer
   x = 1,479,681.00