Finding the Fourth Proportional to 1,563.72, 2,145.17 and 1,537.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,563.72 : 2,145.17 = 1,537.80 : x
2. Step 2: Convert to fraction form
   1,563.72/2,145.17 = 1,537.80/x
3. Step 3: Cross multiply
   1,563.72x = 2,145.17 × 1,537.80
4. Step 4: Simplify right side
   1,563.72x = 3,298,842.43
5. Step 5: Solve for x
   x = 3,298,842.43/1,563.72
6. Step 6: Final answer
   x = 2,109.61