Finding the Fourth Proportional to 222,940.96, 307,802.72 and 138,148

Step by Step Solution

1. Step 1: Write the proportion equation
   222,940.96 : 307,802.72 = 138,148 : x
2. Step 2: Convert to fraction form
   222,940.96/307,802.72 = 138,148/x
3. Step 3: Cross multiply
   222,940.96x = 307,802.72 × 138,148
4. Step 4: Simplify right side
   222,940.96x = 42,522,330,162.56
5. Step 5: Solve for x
   x = 42,522,330,162.56/222,940.96
6. Step 6: Final answer
   x = 190,733.59