Finding the Fourth Proportional to 142,858.42, 197,146.84 and 78,333.55

Step by Step Solution

1. Step 1: Write the proportion equation
   142,858.42 : 197,146.84 = 78,333.55 : x
2. Step 2: Convert to fraction form
   142,858.42/197,146.84 = 78,333.55/x
3. Step 3: Cross multiply
   142,858.42x = 197,146.84 × 78,333.55
4. Step 4: Simplify right side
   142,858.42x = 15,443,211,848.48
5. Step 5: Solve for x
   x = 15,443,211,848.48/142,858.42
6. Step 6: Final answer
   x = 108,101.52