Finding the Fourth Proportional to 111,071.51, 153,119.27 and 79,185.05

Step by Step Solution

1. Step 1: Write the proportion equation
   111,071.51 : 153,119.27 = 79,185.05 : x
2. Step 2: Convert to fraction form
   111,071.51/153,119.27 = 79,185.05/x
3. Step 3: Cross multiply
   111,071.51x = 153,119.27 × 79,185.05
4. Step 4: Simplify right side
   111,071.51x = 12,124,757,037.79
5. Step 5: Solve for x
   x = 12,124,757,037.79/111,071.51
6. Step 6: Final answer
   x = 109,161.72