Finding the Fourth Proportional to 1,928.72, 2,659.56 and 1,888.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,928.72 : 2,659.56 = 1,888.22 : x
2. Step 2: Convert to fraction form
   1,928.72/2,659.56 = 1,888.22/x
3. Step 3: Cross multiply
   1,928.72x = 2,659.56 × 1,888.22
4. Step 4: Simplify right side
   1,928.72x = 5,021,834.38
5. Step 5: Solve for x
   x = 5,021,834.38/1,928.72
6. Step 6: Final answer
   x = 2,603.71