Finding the Fourth Proportional to 298,196.70, 447,141.81 and 87,807.30

Step by Step Solution

1. Step 1: Write the proportion equation
   298,196.70 : 447,141.81 = 87,807.30 : x
2. Step 2: Convert to fraction form
   298,196.70/447,141.81 = 87,807.30/x
3. Step 3: Cross multiply
   298,196.70x = 447,141.81 × 87,807.30
4. Step 4: Simplify right side
   298,196.70x = 39,262,315,053.21
5. Step 5: Solve for x
   x = 39,262,315,053.21/298,196.70
6. Step 6: Final answer
   x = 131,665.83