Finding the Fourth Proportional to 102,878.62, 141,971.78 and 57,556.42

Step by Step Solution

1. Step 1: Write the proportion equation
   102,878.62 : 141,971.78 = 57,556.42 : x
2. Step 2: Convert to fraction form
   102,878.62/141,971.78 = 57,556.42/x
3. Step 3: Cross multiply
   102,878.62x = 141,971.78 × 57,556.42
4. Step 4: Simplify right side
   102,878.62x = 8,171,387,397.83
5. Step 5: Solve for x
   x = 8,171,387,397.83/102,878.62
6. Step 6: Final answer
   x = 79,427.46