Finding the Third Proportional to 149,719.50 and 343,619

Step by Step Solution

1. Step 1: Write the proportion equation
   149,719.50 : 343,619 = 343,619 : x
2. Step 2: Convert to fraction form
   149,719.50/343,619 = 343,619/x
3. Step 3: Cross multiply
   149,719.50x = 343,619 × 343,619
4. Step 4: Simplify right side
   149,719.50x = 118,074,017,161
5. Step 5: Solve for x
   x = 118,074,017,161/149,719.50
6. Step 6: Final answer
   x = 788,634.86