Finding the Fourth Proportional to 111,091.76, 153,147.15 and 79,205.30

Step by Step Solution

1. Step 1: Write the proportion equation
   111,091.76 : 153,147.15 = 79,205.30 : x
2. Step 2: Convert to fraction form
   111,091.76/153,147.15 = 79,205.30/x
3. Step 3: Cross multiply
   111,091.76x = 153,147.15 × 79,205.30
4. Step 4: Simplify right side
   111,091.76x = 12,130,065,959.90
5. Step 5: Solve for x
   x = 12,130,065,959.90/111,091.76
6. Step 6: Final answer
   x = 109,189.61