Finding the Fourth Proportional to 131,645.58, 197,488.85 and 42,878.42

Step by Step Solution

1. Step 1: Write the proportion equation
   131,645.58 : 197,488.85 = 42,878.42 : x
2. Step 2: Convert to fraction form
   131,645.58/197,488.85 = 42,878.42/x
3. Step 3: Cross multiply
   131,645.58x = 197,488.85 × 42,878.42
4. Step 4: Simplify right side
   131,645.58x = 8,468,009,855.62
5. Step 5: Solve for x
   x = 8,468,009,855.62/131,645.58
6. Step 6: Final answer
   x = 64,324.30