Finding the Fourth Proportional to 143,971.89, 198,412.17 and 103,615.59

Step by Step Solution

1. Step 1: Write the proportion equation
   143,971.89 : 198,412.17 = 103,615.59 : x
2. Step 2: Convert to fraction form
   143,971.89/198,412.17 = 103,615.59/x
3. Step 3: Cross multiply
   143,971.89x = 198,412.17 × 103,615.59
4. Step 4: Simplify right side
   143,971.89x = 20,558,594,057.73
5. Step 5: Solve for x
   x = 20,558,594,057.73/143,971.89
6. Step 6: Final answer
   x = 142,795.89