Finding the Fourth Proportional to 190,309.37, 262,654.89 and 109,721.12

Step by Step Solution

1. Step 1: Write the proportion equation
   190,309.37 : 262,654.89 = 109,721.12 : x
2. Step 2: Convert to fraction form
   190,309.37/262,654.89 = 109,721.12/x
3. Step 3: Cross multiply
   190,309.37x = 262,654.89 × 109,721.12
4. Step 4: Simplify right side
   190,309.37x = 28,818,786,979.55
5. Step 5: Solve for x
   x = 28,818,786,979.55/190,309.37
6. Step 6: Final answer
   x = 151,431.26