Finding the Fourth Proportional to 142,377, 196,447.60 and 85,005.14

Step by Step Solution

1. Step 1: Write the proportion equation
   142,377 : 196,447.60 = 85,005.14 : x
2. Step 2: Convert to fraction form
   142,377/196,447.60 = 85,005.14/x
3. Step 3: Cross multiply
   142,377x = 196,447.60 × 85,005.14
4. Step 4: Simplify right side
   142,377x = 16,699,055,740.66
5. Step 5: Solve for x
   x = 16,699,055,740.66/142,377
6. Step 6: Final answer
   x = 117,287.59