Finding the Fourth Proportional to 250,010.72, 345,015.72 and 135,289.37

Step by Step Solution

1. Step 1: Write the proportion equation
   250,010.72 : 345,015.72 = 135,289.37 : x
2. Step 2: Convert to fraction form
   250,010.72/345,015.72 = 135,289.37/x
3. Step 3: Cross multiply
   250,010.72x = 345,015.72 × 135,289.37
4. Step 4: Simplify right side
   250,010.72x = 46,676,959,398.90
5. Step 5: Solve for x
   x = 46,676,959,398.90/250,010.72
6. Step 6: Final answer
   x = 186,699.83