Finding the Third Proportional to 478,606 and 740,987

Step by Step Solution

1. Step 1: Write the proportion equation
   478,606 : 740,987 = 740,987 : x
2. Step 2: Convert to fraction form
   478,606/740,987 = 740,987/x
3. Step 3: Cross multiply
   478,606x = 740,987 × 740,987
4. Step 4: Simplify right side
   478,606x = 549,061,734,169
5. Step 5: Solve for x
   x = 549,061,734,169/478,606
6. Step 6: Final answer
   x = 1,147,210.30