Finding the Fourth Proportional to 142,147.64, 196,162.47 and 78,484.07

Step by Step Solution

1. Step 1: Write the proportion equation
   142,147.64 : 196,162.47 = 78,484.07 : x
2. Step 2: Convert to fraction form
   142,147.64/196,162.47 = 78,484.07/x
3. Step 3: Cross multiply
   142,147.64x = 196,162.47 × 78,484.07
4. Step 4: Simplify right side
   142,147.64x = 15,395,628,046.04
5. Step 5: Solve for x
   x = 15,395,628,046.04/142,147.64
6. Step 6: Final answer
   x = 108,307.31