Finding the Fourth Proportional to 539,887.82, 745,043.27 and 298,196.78

Step by Step Solution

1. Step 1: Write the proportion equation
   539,887.82 : 745,043.27 = 298,196.78 : x
2. Step 2: Convert to fraction form
   539,887.82/745,043.27 = 298,196.78/x
3. Step 3: Cross multiply
   539,887.82x = 745,043.27 × 298,196.78
4. Step 4: Simplify right side
   539,887.82x = 222,169,498,858.47
5. Step 5: Solve for x
   x = 222,169,498,858.47/539,887.82
6. Step 6: Final answer
   x = 411,510.49