Finding the Fourth Proportional to 105,072.56, 157,616.52 and 30,189.68

Step by Step Solution

1. Step 1: Write the proportion equation
   105,072.56 : 157,616.52 = 30,189.68 : x
2. Step 2: Convert to fraction form
   105,072.56/157,616.52 = 30,189.68/x
3. Step 3: Cross multiply
   105,072.56x = 157,616.52 × 30,189.68
4. Step 4: Simplify right side
   105,072.56x = 4,758,392,301.51
5. Step 5: Solve for x
   x = 4,758,392,301.51/105,072.56
6. Step 6: Final answer
   x = 45,286.73