Finding the Fourth Proportional to 2,215.99, 3,322.60 and 948.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.99 : 3,322.60 = 948.07 : x
2. Step 2: Convert to fraction form
   2,215.99/3,322.60 = 948.07/x
3. Step 3: Cross multiply
   2,215.99x = 3,322.60 × 948.07
4. Step 4: Simplify right side
   2,215.99x = 3,150,057.38
5. Step 5: Solve for x
   x = 3,150,057.38/2,215.99
6. Step 6: Final answer
   x = 1,421.51