Finding the Fourth Proportional to 1,399.02, 1,931.22 and 901.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.02 : 1,931.22 = 901.68 : x
2. Step 2: Convert to fraction form
   1,399.02/1,931.22 = 901.68/x
3. Step 3: Cross multiply
   1,399.02x = 1,931.22 × 901.68
4. Step 4: Simplify right side
   1,399.02x = 1,741,342.45
5. Step 5: Solve for x
   x = 1,741,342.45/1,399.02
6. Step 6: Final answer
   x = 1,244.69