Finding the Fourth Proportional to 250,012.72, 345,018.48 and 135,291.37

Step by Step Solution

1. Step 1: Write the proportion equation
   250,012.72 : 345,018.48 = 135,291.37 : x
2. Step 2: Convert to fraction form
   250,012.72/345,018.48 = 135,291.37/x
3. Step 3: Cross multiply
   250,012.72x = 345,018.48 × 135,291.37
4. Step 4: Simplify right side
   250,012.72x = 46,678,022,834.52
5. Step 5: Solve for x
   x = 46,678,022,834.52/250,012.72
6. Step 6: Final answer
   x = 186,702.59