Finding the Fourth Proportional to 308,997.08, 426,380.73 and 173,012.12

Step by Step Solution

1. Step 1: Write the proportion equation
   308,997.08 : 426,380.73 = 173,012.12 : x
2. Step 2: Convert to fraction form
   308,997.08/426,380.73 = 173,012.12/x
3. Step 3: Cross multiply
   308,997.08x = 426,380.73 × 173,012.12
4. Step 4: Simplify right side
   308,997.08x = 73,769,034,024.45
5. Step 5: Solve for x
   x = 73,769,034,024.45/308,997.08
6. Step 6: Final answer
   x = 238,736.99