Finding the Fourth Proportional to 2,887.57, 4,331.72 and 1,038.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,887.57 : 4,331.72 = 1,038.88 : x
2. Step 2: Convert to fraction form
   2,887.57/4,331.72 = 1,038.88/x
3. Step 3: Cross multiply
   2,887.57x = 4,331.72 × 1,038.88
4. Step 4: Simplify right side
   2,887.57x = 4,500,137.27
5. Step 5: Solve for x
   x = 4,500,137.27/2,887.57
6. Step 6: Final answer
   x = 1,558.45