Finding the Fourth Proportional to 1,043.55, 1,558.78 and 1,038.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,043.55 : 1,558.78 = 1,038.69 : x
2. Step 2: Convert to fraction form
   1,043.55/1,558.78 = 1,038.69/x
3. Step 3: Cross multiply
   1,043.55x = 1,558.78 × 1,038.69
4. Step 4: Simplify right side
   1,043.55x = 1,619,086.60
5. Step 5: Solve for x
   x = 1,619,086.60/1,043.55
6. Step 6: Final answer
   x = 1,551.52