Finding the Fourth Proportional to 10,545.57, 15,785.42 and 7,038.45

Step by Step Solution

1. Step 1: Write the proportion equation
   10,545.57 : 15,785.42 = 7,038.45 : x
2. Step 2: Convert to fraction form
   10,545.57/15,785.42 = 7,038.45/x
3. Step 3: Cross multiply
   10,545.57x = 15,785.42 × 7,038.45
4. Step 4: Simplify right side
   10,545.57x = 111,104,854.21
5. Step 5: Solve for x
   x = 111,104,854.21/10,545.57
6. Step 6: Final answer
   x = 10,535.69