Finding the Third Proportional to 155,980.69 and 336,820.78

Step by Step Solution

1. Step 1: Write the proportion equation
   155,980.69 : 336,820.78 = 336,820.78 : x
2. Step 2: Convert to fraction form
   155,980.69/336,820.78 = 336,820.78/x
3. Step 3: Cross multiply
   155,980.69x = 336,820.78 × 336,820.78
4. Step 4: Simplify right side
   155,980.69x = 113,448,238,681.86
5. Step 5: Solve for x
   x = 113,448,238,681.86/155,980.69
6. Step 6: Final answer
   x = 727,322.34