Finding the Fourth Proportional to 142,521.24, 196,685.10 and 78,858

Step by Step Solution

1. Step 1: Write the proportion equation
   142,521.24 : 196,685.10 = 78,858 : x
2. Step 2: Convert to fraction form
   142,521.24/196,685.10 = 78,858/x
3. Step 3: Cross multiply
   142,521.24x = 196,685.10 × 78,858
4. Step 4: Simplify right side
   142,521.24x = 15,510,193,615.80
5. Step 5: Solve for x
   x = 15,510,193,615.80/142,521.24
6. Step 6: Final answer
   x = 108,827.24