Finding the Fourth Proportional to 158,940.41, 219,395.31 and 105,242.72

Step by Step Solution

1. Step 1: Write the proportion equation
   158,940.41 : 219,395.31 = 105,242.72 : x
2. Step 2: Convert to fraction form
   158,940.41/219,395.31 = 105,242.72/x
3. Step 3: Cross multiply
   158,940.41x = 219,395.31 × 105,242.72
4. Step 4: Simplify right side
   158,940.41x = 23,089,757,688.01
5. Step 5: Solve for x
   x = 23,089,757,688.01/158,940.41
6. Step 6: Final answer
   x = 145,273.05