Finding the Fourth Proportional to 111,072.56, 153,120.71 and 79,186.10

Step by Step Solution

1. Step 1: Write the proportion equation
   111,072.56 : 153,120.71 = 79,186.10 : x
2. Step 2: Convert to fraction form
   111,072.56/153,120.71 = 79,186.10/x
3. Step 3: Cross multiply
   111,072.56x = 153,120.71 × 79,186.10
4. Step 4: Simplify right side
   111,072.56x = 12,125,031,854.13
5. Step 5: Solve for x
   x = 12,125,031,854.13/111,072.56
6. Step 6: Final answer
   x = 109,163.16