Finding the Fourth Proportional to 1,298,499.05, 1,947,846.49 and 387,609.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,298,499.05 : 1,947,846.49 = 387,609.57 : x
2. Step 2: Convert to fraction form
   1,298,499.05/1,947,846.49 = 387,609.57/x
3. Step 3: Cross multiply
   1,298,499.05x = 1,947,846.49 × 387,609.57
4. Step 4: Simplify right side
   1,298,499.05x = 755,003,939,445.89
5. Step 5: Solve for x
   x = 755,003,939,445.89/1,298,499.05
6. Step 6: Final answer
   x = 581,443.58