Finding the Fourth Proportional to 222,485.82, 307,128.15 and 142,018.26

Step by Step Solution

1. Step 1: Write the proportion equation
   222,485.82 : 307,128.15 = 142,018.26 : x
2. Step 2: Convert to fraction form
   222,485.82/307,128.15 = 142,018.26/x
3. Step 3: Cross multiply
   222,485.82x = 307,128.15 × 142,018.26
4. Step 4: Simplify right side
   222,485.82x = 43,617,805,460.02
5. Step 5: Solve for x
   x = 43,617,805,460.02/222,485.82
6. Step 6: Final answer
   x = 196,047.57