Finding the Fourth Proportional to 7,878.83, 10,875.56 and 7,038.07

Step by Step Solution

1. Step 1: Write the proportion equation
   7,878.83 : 10,875.56 = 7,038.07 : x
2. Step 2: Convert to fraction form
   7,878.83/10,875.56 = 7,038.07/x
3. Step 3: Cross multiply
   7,878.83x = 10,875.56 × 7,038.07
4. Step 4: Simplify right side
   7,878.83x = 76,542,942.98
5. Step 5: Solve for x
   x = 76,542,942.98/7,878.83
6. Step 6: Final answer
   x = 9,715.02