Finding the Fourth Proportional to 1,563.18, 2,151.71 and 1,415.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,563.18 : 2,151.71 = 1,415.57 : x
2. Step 2: Convert to fraction form
   1,563.18/2,151.71 = 1,415.57/x
3. Step 3: Cross multiply
   1,563.18x = 2,151.71 × 1,415.57
4. Step 4: Simplify right side
   1,563.18x = 3,045,878.29
5. Step 5: Solve for x
   x = 3,045,878.29/1,563.18
6. Step 6: Final answer
   x = 1,948.51