Finding the Fourth Proportional to 1,478.21, 2,038.74 and 888.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,478.21 : 2,038.74 = 888.62 : x
2. Step 2: Convert to fraction form
   1,478.21/2,038.74 = 888.62/x
3. Step 3: Cross multiply
   1,478.21x = 2,038.74 × 888.62
4. Step 4: Simplify right side
   1,478.21x = 1,811,665.14
5. Step 5: Solve for x
   x = 1,811,665.14/1,478.21
6. Step 6: Final answer
   x = 1,225.58