Finding the Fourth Proportional to 2,298.21, 3,448.85 and 999.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,298.21 : 3,448.85 = 999.78 : x
2. Step 2: Convert to fraction form
   2,298.21/3,448.85 = 999.78/x
3. Step 3: Cross multiply
   2,298.21x = 3,448.85 × 999.78
4. Step 4: Simplify right side
   2,298.21x = 3,448,086.25
5. Step 5: Solve for x
   x = 3,448,086.25/2,298.21
6. Step 6: Final answer
   x = 1,500.34