Finding the Third Proportional to 429,079.50 and 636,288.50

Step by Step Solution

1. Step 1: Write the proportion equation
   429,079.50 : 636,288.50 = 636,288.50 : x
2. Step 2: Convert to fraction form
   429,079.50/636,288.50 = 636,288.50/x
3. Step 3: Cross multiply
   429,079.50x = 636,288.50 × 636,288.50
4. Step 4: Simplify right side
   429,079.50x = 404,863,055,232.25
5. Step 5: Solve for x
   x = 404,863,055,232.25/429,079.50
6. Step 6: Final answer
   x = 943,561.87