Finding the Fourth Proportional to 1,298,498.48, 1,947,845.55 and 387,608.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,298,498.48 : 1,947,845.55 = 387,608.96 : x
2. Step 2: Convert to fraction form
   1,298,498.48/1,947,845.55 = 387,608.96/x
3. Step 3: Cross multiply
   1,298,498.48x = 1,947,845.55 × 387,608.96
4. Step 4: Simplify right side
   1,298,498.48x = 755,002,378,136.90
5. Step 5: Solve for x
   x = 755,002,378,136.90/1,298,498.48
6. Step 6: Final answer
   x = 581,442.64