Finding the Fourth Proportional to 1,400.42, 1,931.72 and 902.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,400.42 : 1,931.72 = 902.28 : x
2. Step 2: Convert to fraction form
   1,400.42/1,931.72 = 902.28/x
3. Step 3: Cross multiply
   1,400.42x = 1,931.72 × 902.28
4. Step 4: Simplify right side
   1,400.42x = 1,742,952.32
5. Step 5: Solve for x
   x = 1,742,952.32/1,400.42
6. Step 6: Final answer
   x = 1,244.59