Finding the Fourth Proportional to 142,815.72, 197,085.86 and 79,153.57

Step by Step Solution

1. Step 1: Write the proportion equation
   142,815.72 : 197,085.86 = 79,153.57 : x
2. Step 2: Convert to fraction form
   142,815.72/197,085.86 = 79,153.57/x
3. Step 3: Cross multiply
   142,815.72x = 197,085.86 × 79,153.57
4. Step 4: Simplify right side
   142,815.72x = 15,600,049,562.94
5. Step 5: Solve for x
   x = 15,600,049,562.94/142,815.72
6. Step 6: Final answer
   x = 109,232.02