Finding the Fourth Proportional to 143,784, 198,419.24 and 78,373.38

Step by Step Solution

1. Step 1: Write the proportion equation
   143,784 : 198,419.24 = 78,373.38 : x
2. Step 2: Convert to fraction form
   143,784/198,419.24 = 78,373.38/x
3. Step 3: Cross multiply
   143,784x = 198,419.24 × 78,373.38
4. Step 4: Simplify right side
   143,784x = 15,550,786,495.83
5. Step 5: Solve for x
   x = 15,550,786,495.83/143,784
6. Step 6: Final answer
   x = 108,153.80