Finding the Fourth Proportional to 142,054.78, 196,053.67 and 85,496.70

Step by Step Solution

1. Step 1: Write the proportion equation
   142,054.78 : 196,053.67 = 85,496.70 : x
2. Step 2: Convert to fraction form
   142,054.78/196,053.67 = 85,496.70/x
3. Step 3: Cross multiply
   142,054.78x = 196,053.67 × 85,496.70
4. Step 4: Simplify right side
   142,054.78x = 16,761,941,807.89
5. Step 5: Solve for x
   x = 16,761,941,807.89/142,054.78
6. Step 6: Final answer
   x = 117,996.32