Finding the Fourth Proportional to 142,142.89, 196,160.25 and 78,484.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,142.89 : 196,160.25 = 78,484.72 : x
2. Step 2: Convert to fraction form
   142,142.89/196,160.25 = 78,484.72/x
3. Step 3: Cross multiply
   142,142.89x = 196,160.25 × 78,484.72
4. Step 4: Simplify right side
   142,142.89x = 15,395,582,296.38
5. Step 5: Solve for x
   x = 15,395,582,296.38/142,142.89
6. Step 6: Final answer
   x = 108,310.60