Finding the Fourth Proportional to 90,019.72, 124,229.72 and 49,736.08

Step by Step Solution

1. Step 1: Write the proportion equation
   90,019.72 : 124,229.72 = 49,736.08 : x
2. Step 2: Convert to fraction form
   90,019.72/124,229.72 = 49,736.08/x
3. Step 3: Cross multiply
   90,019.72x = 124,229.72 × 49,736.08
4. Step 4: Simplify right side
   90,019.72x = 6,178,698,422.47
5. Step 5: Solve for x
   x = 6,178,698,422.47/90,019.72
6. Step 6: Final answer
   x = 68,637.17