Finding the Fourth Proportional to 1,411.04, 2,128.72 and 1,372.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.04 : 2,128.72 = 1,372.16 : x
2. Step 2: Convert to fraction form
   1,411.04/2,128.72 = 1,372.16/x
3. Step 3: Cross multiply
   1,411.04x = 2,128.72 × 1,372.16
4. Step 4: Simplify right side
   1,411.04x = 2,920,944.44
5. Step 5: Solve for x
   x = 2,920,944.44/1,411.04
6. Step 6: Final answer
   x = 2,070.06