Finding the Fourth Proportional to 142,271.95, 196,339.25 and 78,613.87

Step by Step Solution

1. Step 1: Write the proportion equation
   142,271.95 : 196,339.25 = 78,613.87 : x
2. Step 2: Convert to fraction form
   142,271.95/196,339.25 = 78,613.87/x
3. Step 3: Cross multiply
   142,271.95x = 196,339.25 × 78,613.87
4. Step 4: Simplify right side
   142,271.95x = 15,434,988,275.40
5. Step 5: Solve for x
   x = 15,434,988,275.40/142,271.95
6. Step 6: Final answer
   x = 108,489.33