Finding the Fourth Proportional to 1,056,978.99, 1,585,176.89 and 298,760.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056,978.99 : 1,585,176.89 = 298,760.67 : x
2. Step 2: Convert to fraction form
   1,056,978.99/1,585,176.89 = 298,760.67/x
3. Step 3: Cross multiply
   1,056,978.99x = 1,585,176.89 × 298,760.67
4. Step 4: Simplify right side
   1,056,978.99x = 473,588,508,231.11
5. Step 5: Solve for x
   x = 473,588,508,231.11/1,056,978.99
6. Step 6: Final answer
   x = 448,058.58