Finding the Fourth Proportional to 1,396.58, 1,928.57 and 900.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,396.58 : 1,928.57 = 900.06 : x
2. Step 2: Convert to fraction form
   1,396.58/1,928.57 = 900.06/x
3. Step 3: Cross multiply
   1,396.58x = 1,928.57 × 900.06
4. Step 4: Simplify right side
   1,396.58x = 1,735,824.21
5. Step 5: Solve for x
   x = 1,735,824.21/1,396.58
6. Step 6: Final answer
   x = 1,242.92