Finding the Fourth Proportional to 8,595.57, 12,908.69 and 7,038.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,595.57 : 12,908.69 = 7,038.55 : x
2. Step 2: Convert to fraction form
   8,595.57/12,908.69 = 7,038.55/x
3. Step 3: Cross multiply
   8,595.57x = 12,908.69 × 7,038.55
4. Step 4: Simplify right side
   8,595.57x = 90,858,445.32
5. Step 5: Solve for x
   x = 90,858,445.32/8,595.57
6. Step 6: Final answer
   x = 10,570.38