Finding the Fourth Proportional to 328,404.18, 492,800.82 and 138,854.18

Step by Step Solution

1. Step 1: Write the proportion equation
   328,404.18 : 492,800.82 = 138,854.18 : x
2. Step 2: Convert to fraction form
   328,404.18/492,800.82 = 138,854.18/x
3. Step 3: Cross multiply
   328,404.18x = 492,800.82 × 138,854.18
4. Step 4: Simplify right side
   328,404.18x = 68,427,453,764.43
5. Step 5: Solve for x
   x = 68,427,453,764.43/328,404.18
6. Step 6: Final answer
   x = 208,363.53