Finding the Fourth Proportional to 1,561.43, 2,156.54 and 1,063.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.43 : 2,156.54 = 1,063.20 : x
2. Step 2: Convert to fraction form
   1,561.43/2,156.54 = 1,063.20/x
3. Step 3: Cross multiply
   1,561.43x = 2,156.54 × 1,063.20
4. Step 4: Simplify right side
   1,561.43x = 2,292,836.01
5. Step 5: Solve for x
   x = 2,292,836.01/1,561.43
6. Step 6: Final answer
   x = 1,468.42