Finding the Fourth Proportional to 2,657.12, 3,666.72 and 1,478.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,657.12 : 3,666.72 = 1,478.08 : x
2. Step 2: Convert to fraction form
   2,657.12/3,666.72 = 1,478.08/x
3. Step 3: Cross multiply
   2,657.12x = 3,666.72 × 1,478.08
4. Step 4: Simplify right side
   2,657.12x = 5,419,705.50
5. Step 5: Solve for x
   x = 5,419,705.50/2,657.12
6. Step 6: Final answer
   x = 2,039.69