Finding the Third Proportional to 128,004 and 279,300

Step by Step Solution

1. Step 1: Write the proportion equation
   128,004 : 279,300 = 279,300 : x
2. Step 2: Convert to fraction form
   128,004/279,300 = 279,300/x
3. Step 3: Cross multiply
   128,004x = 279,300 × 279,300
4. Step 4: Simplify right side
   128,004x = 78,008,490,000
5. Step 5: Solve for x
   x = 78,008,490,000/128,004
6. Step 6: Final answer
   x = 609,422.28