Finding the Fourth Proportional to 142,856.52, 197,131.34 and 78,315.42

Step by Step Solution

1. Step 1: Write the proportion equation
   142,856.52 : 197,131.34 = 78,315.42 : x
2. Step 2: Convert to fraction form
   142,856.52/197,131.34 = 78,315.42/x
3. Step 3: Cross multiply
   142,856.52x = 197,131.34 × 78,315.42
4. Step 4: Simplify right side
   142,856.52x = 15,438,423,687.26
5. Step 5: Solve for x
   x = 15,438,423,687.26/142,856.52
6. Step 6: Final answer
   x = 108,069.44