Finding the Third Proportional to 478,610 and 740,992

Step by Step Solution

1. Step 1: Write the proportion equation
   478,610 : 740,992 = 740,992 : x
2. Step 2: Convert to fraction form
   478,610/740,992 = 740,992/x
3. Step 3: Cross multiply
   478,610x = 740,992 × 740,992
4. Step 4: Simplify right side
   478,610x = 549,069,144,064
5. Step 5: Solve for x
   x = 549,069,144,064/478,610
6. Step 6: Final answer
   x = 1,147,216.20