Finding the Third Proportional to 279,252 and 431,515.50

Step by Step Solution

1. Step 1: Write the proportion equation
   279,252 : 431,515.50 = 431,515.50 : x
2. Step 2: Convert to fraction form
   279,252/431,515.50 = 431,515.50/x
3. Step 3: Cross multiply
   279,252x = 431,515.50 × 431,515.50
4. Step 4: Simplify right side
   279,252x = 186,205,626,740.25
5. Step 5: Solve for x
   x = 186,205,626,740.25/279,252
6. Step 6: Final answer
   x = 666,801.41