Finding the Fourth Proportional to 90,431.06, 124,788.78 and 50,143.33

Step by Step Solution

1. Step 1: Write the proportion equation
   90,431.06 : 124,788.78 = 50,143.33 : x
2. Step 2: Convert to fraction form
   90,431.06/124,788.78 = 50,143.33/x
3. Step 3: Cross multiply
   90,431.06x = 124,788.78 × 50,143.33
4. Step 4: Simplify right side
   90,431.06x = 6,257,325,131.82
5. Step 5: Solve for x
   x = 6,257,325,131.82/90,431.06
6. Step 6: Final answer
   x = 69,194.43