Finding the Fourth Proportional to 1,888.72, 2,819.96 and 1,772.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,888.72 : 2,819.96 = 1,772.08 : x
2. Step 2: Convert to fraction form
   1,888.72/2,819.96 = 1,772.08/x
3. Step 3: Cross multiply
   1,888.72x = 2,819.96 × 1,772.08
4. Step 4: Simplify right side
   1,888.72x = 4,997,194.72
5. Step 5: Solve for x
   x = 4,997,194.72/1,888.72
6. Step 6: Final answer
   x = 2,645.81