Finding the Fourth Proportional to 143,107.86, 197,489.72 and 78,579.88

Step by Step Solution

1. Step 1: Write the proportion equation
   143,107.86 : 197,489.72 = 78,579.88 : x
2. Step 2: Convert to fraction form
   143,107.86/197,489.72 = 78,579.88/x
3. Step 3: Cross multiply
   143,107.86x = 197,489.72 × 78,579.88
4. Step 4: Simplify right side
   143,107.86x = 15,518,718,498.83
5. Step 5: Solve for x
   x = 15,518,718,498.83/143,107.86
6. Step 6: Final answer
   x = 108,440.71