Finding the Fourth Proportional to 111,089.76, 153,144.39 and 79,203.30

Step by Step Solution

1. Step 1: Write the proportion equation
   111,089.76 : 153,144.39 = 79,203.30 : x
2. Step 2: Convert to fraction form
   111,089.76/153,144.39 = 79,203.30/x
3. Step 3: Cross multiply
   111,089.76x = 153,144.39 × 79,203.30
4. Step 4: Simplify right side
   111,089.76x = 12,129,541,064.49
5. Step 5: Solve for x
   x = 12,129,541,064.49/111,089.76
6. Step 6: Final answer
   x = 109,186.85