Finding the Fourth Proportional to 1,572.90, 2,142.06 and 1,563.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,572.90 : 2,142.06 = 1,563.18 : x
2. Step 2: Convert to fraction form
   1,572.90/2,142.06 = 1,563.18/x
3. Step 3: Cross multiply
   1,572.90x = 2,142.06 × 1,563.18
4. Step 4: Simplify right side
   1,572.90x = 3,348,425.35
5. Step 5: Solve for x
   x = 3,348,425.35/1,572.90
6. Step 6: Final answer
   x = 2,128.82