Finding the Fourth Proportional to 1,478.76, 2,204.22 and 1,431.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,478.76 : 2,204.22 = 1,431.60 : x
2. Step 2: Convert to fraction form
   1,478.76/2,204.22 = 1,431.60/x
3. Step 3: Cross multiply
   1,478.76x = 2,204.22 × 1,431.60
4. Step 4: Simplify right side
   1,478.76x = 3,155,561.35
5. Step 5: Solve for x
   x = 3,155,561.35/1,478.76
6. Step 6: Final answer
   x = 2,133.92