Finding the Fourth Proportional to 1,572.12, 2,184.56 and 1,555.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,572.12 : 2,184.56 = 1,555.04 : x
2. Step 2: Convert to fraction form
   1,572.12/2,184.56 = 1,555.04/x
3. Step 3: Cross multiply
   1,572.12x = 2,184.56 × 1,555.04
4. Step 4: Simplify right side
   1,572.12x = 3,397,071.15
5. Step 5: Solve for x
   x = 3,397,071.15/1,572.12
6. Step 6: Final answer
   x = 2,160.82