Finding the Fourth Proportional to 136,859.85, 188,825.27 and 79,488.09

Step by Step Solution

1. Step 1: Write the proportion equation
   136,859.85 : 188,825.27 = 79,488.09 : x
2. Step 2: Convert to fraction form
   136,859.85/188,825.27 = 79,488.09/x
3. Step 3: Cross multiply
   136,859.85x = 188,825.27 × 79,488.09
4. Step 4: Simplify right side
   136,859.85x = 15,009,359,658.59
5. Step 5: Solve for x
   x = 15,009,359,658.59/136,859.85
6. Step 6: Final answer
   x = 109,669.56