Finding the Third Proportional to 139,390 and 296,761

Step by Step Solution

1. Step 1: Write the proportion equation
   139,390 : 296,761 = 296,761 : x
2. Step 2: Convert to fraction form
   139,390/296,761 = 296,761/x
3. Step 3: Cross multiply
   139,390x = 296,761 × 296,761
4. Step 4: Simplify right side
   139,390x = 88,067,091,121
5. Step 5: Solve for x
   x = 88,067,091,121/139,390
6. Step 6: Final answer
   x = 631,803.51