Finding the Fourth Proportional to 120,190.69, 165,753.41 and 103,189.49

Step by Step Solution

1. Step 1: Write the proportion equation
   120,190.69 : 165,753.41 = 103,189.49 : x
2. Step 2: Convert to fraction form
   120,190.69/165,753.41 = 103,189.49/x
3. Step 3: Cross multiply
   120,190.69x = 165,753.41 × 103,189.49
4. Step 4: Simplify right side
   120,190.69x = 17,104,010,923.55
5. Step 5: Solve for x
   x = 17,104,010,923.55/120,190.69
6. Step 6: Final answer
   x = 142,307.29