Finding the Fourth Proportional to 142,145.02, 196,158.78 and 78,483.26

Step by Step Solution

1. Step 1: Write the proportion equation
   142,145.02 : 196,158.78 = 78,483.26 : x
2. Step 2: Convert to fraction form
   142,145.02/196,158.78 = 78,483.26/x
3. Step 3: Cross multiply
   142,145.02x = 196,158.78 × 78,483.26
4. Step 4: Simplify right side
   142,145.02x = 15,395,180,532.02
5. Step 5: Solve for x
   x = 15,395,180,532.02/142,145.02
6. Step 6: Final answer
   x = 108,306.15