Finding the Fourth Proportional to 221,087.76, 305,150.34 and 140,499.56

Step by Step Solution

1. Step 1: Write the proportion equation
   221,087.76 : 305,150.34 = 140,499.56 : x
2. Step 2: Convert to fraction form
   221,087.76/305,150.34 = 140,499.56/x
3. Step 3: Cross multiply
   221,087.76x = 305,150.34 × 140,499.56
4. Step 4: Simplify right side
   221,087.76x = 42,873,488,503.85
5. Step 5: Solve for x
   x = 42,873,488,503.85/221,087.76
6. Step 6: Final answer
   x = 193,920.68