Finding the Fourth Proportional to 221,103.78, 305,172.42 and 140,515.56

Step by Step Solution

1. Step 1: Write the proportion equation
   221,103.78 : 305,172.42 = 140,515.56 : x
2. Step 2: Convert to fraction form
   221,103.78/305,172.42 = 140,515.56/x
3. Step 3: Cross multiply
   221,103.78x = 305,172.42 × 140,515.56
4. Step 4: Simplify right side
   221,103.78x = 42,881,473,492.86
5. Step 5: Solve for x
   x = 42,881,473,492.86/221,103.78
6. Step 6: Final answer
   x = 193,942.74