Finding the Fourth Proportional to 2,978.99, 4,467.05 and 898.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.99 : 4,467.05 = 898.61 : x
2. Step 2: Convert to fraction form
   2,978.99/4,467.05 = 898.61/x
3. Step 3: Cross multiply
   2,978.99x = 4,467.05 × 898.61
4. Step 4: Simplify right side
   2,978.99x = 4,014,142.48
5. Step 5: Solve for x
   x = 4,014,142.48/2,978.99
6. Step 6: Final answer
   x = 1,347.48