Finding the Fourth Proportional to 1,047.55, 1,564.76 and 1,042.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.55 : 1,564.76 = 1,042.69 : x
2. Step 2: Convert to fraction form
   1,047.55/1,564.76 = 1,042.69/x
3. Step 3: Cross multiply
   1,047.55x = 1,564.76 × 1,042.69
4. Step 4: Simplify right side
   1,047.55x = 1,631,559.60
5. Step 5: Solve for x
   x = 1,631,559.60/1,047.55
6. Step 6: Final answer
   x = 1,557.50