Finding the Third Proportional to 155,611.13 and 339,499.69

Step by Step Solution

1. Step 1: Write the proportion equation
   155,611.13 : 339,499.69 = 339,499.69 : x
2. Step 2: Convert to fraction form
   155,611.13/339,499.69 = 339,499.69/x
3. Step 3: Cross multiply
   155,611.13x = 339,499.69 × 339,499.69
4. Step 4: Simplify right side
   155,611.13x = 115,260,037,812.60
5. Step 5: Solve for x
   x = 115,260,037,812.60/155,611.13
6. Step 6: Final answer
   x = 740,692.79