Finding the Fourth Proportional to 142,981.72, 197,314.85 and 79,319.56

Step by Step Solution

1. Step 1: Write the proportion equation
   142,981.72 : 197,314.85 = 79,319.56 : x
2. Step 2: Convert to fraction form
   142,981.72/197,314.85 = 79,319.56/x
3. Step 3: Cross multiply
   142,981.72x = 197,314.85 × 79,319.56
4. Step 4: Simplify right side
   142,981.72x = 15,650,927,083.47
5. Step 5: Solve for x
   x = 15,650,927,083.47/142,981.72
6. Step 6: Final answer
   x = 109,461.04