Finding the Fourth Proportional to 1,564.79, 2,159.33 and 1,123.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,564.79 : 2,159.33 = 1,123.47 : x
2. Step 2: Convert to fraction form
   1,564.79/2,159.33 = 1,123.47/x
3. Step 3: Cross multiply
   1,564.79x = 2,159.33 × 1,123.47
4. Step 4: Simplify right side
   1,564.79x = 2,425,936.86
5. Step 5: Solve for x
   x = 2,425,936.86/1,564.79
6. Step 6: Final answer
   x = 1,550.33