Finding the Third Proportional to 428,253 and 666,904.50

Step by Step Solution

1. Step 1: Write the proportion equation
   428,253 : 666,904.50 = 666,904.50 : x
2. Step 2: Convert to fraction form
   428,253/666,904.50 = 666,904.50/x
3. Step 3: Cross multiply
   428,253x = 666,904.50 × 666,904.50
4. Step 4: Simplify right side
   428,253x = 444,761,612,120.25
5. Step 5: Solve for x
   x = 444,761,612,120.25/428,253
6. Step 6: Final answer
   x = 1,038,548.74