Finding the Fourth Proportional to 2,155.19, 2,972.25 and 1,557.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.19 : 2,972.25 = 1,557.52 : x
2. Step 2: Convert to fraction form
   2,155.19/2,972.25 = 1,557.52/x
3. Step 3: Cross multiply
   2,155.19x = 2,972.25 × 1,557.52
4. Step 4: Simplify right side
   2,155.19x = 4,629,331.39
5. Step 5: Solve for x
   x = 4,629,331.39/2,155.19
6. Step 6: Final answer
   x = 2,148.00