Finding the Third Proportional to 289,375.50 and 634,776

Step by Step Solution

1. Step 1: Write the proportion equation
   289,375.50 : 634,776 = 634,776 : x
2. Step 2: Convert to fraction form
   289,375.50/634,776 = 634,776/x
3. Step 3: Cross multiply
   289,375.50x = 634,776 × 634,776
4. Step 4: Simplify right side
   289,375.50x = 402,940,570,176
5. Step 5: Solve for x
   x = 402,940,570,176/289,375.50
6. Step 6: Final answer
   x = 1,392,448.81