Finding the Fourth Proportional to 2,538.68, 3,504.12 and 1,607.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,538.68 : 3,504.12 = 1,607.72 : x
2. Step 2: Convert to fraction form
   2,538.68/3,504.12 = 1,607.72/x
3. Step 3: Cross multiply
   2,538.68x = 3,504.12 × 1,607.72
4. Step 4: Simplify right side
   2,538.68x = 5,633,643.81
5. Step 5: Solve for x
   x = 5,633,643.81/2,538.68
6. Step 6: Final answer
   x = 2,219.12