Finding the Fourth Proportional to 90,426.27, 124,788.04 and 50,139

Step by Step Solution

1. Step 1: Write the proportion equation
   90,426.27 : 124,788.04 = 50,139 : x
2. Step 2: Convert to fraction form
   90,426.27/124,788.04 = 50,139/x
3. Step 3: Cross multiply
   90,426.27x = 124,788.04 × 50,139
4. Step 4: Simplify right side
   90,426.27x = 6,256,747,694.24
5. Step 5: Solve for x
   x = 6,256,747,694.24/90,426.27
6. Step 6: Final answer
   x = 69,191.70