Finding the Fourth Proportional to 90,399.23, 124,742.56 and 50,109.57

Step by Step Solution

1. Step 1: Write the proportion equation
   90,399.23 : 124,742.56 = 50,109.57 : x
2. Step 2: Convert to fraction form
   90,399.23/124,742.56 = 50,109.57/x
3. Step 3: Cross multiply
   90,399.23x = 124,742.56 × 50,109.57
4. Step 4: Simplify right side
   90,399.23x = 6,250,796,042.30
5. Step 5: Solve for x
   x = 6,250,796,042.30/90,399.23
6. Step 6: Final answer
   x = 69,146.56