Finding the Fourth Proportional to 143,405, 197,904.54 and 78,880.24

Step by Step Solution

1. Step 1: Write the proportion equation
   143,405 : 197,904.54 = 78,880.24 : x
2. Step 2: Convert to fraction form
   143,405/197,904.54 = 78,880.24/x
3. Step 3: Cross multiply
   143,405x = 197,904.54 × 78,880.24
4. Step 4: Simplify right side
   143,405x = 15,610,757,612.29
5. Step 5: Solve for x
   x = 15,610,757,612.29/143,405
6. Step 6: Final answer
   x = 108,857.83