Finding the Fourth Proportional to 7,778.00, 10,689.38 and 7,285.92

Step by Step Solution

1. Step 1: Write the proportion equation
   7,778.00 : 10,689.38 = 7,285.92 : x
2. Step 2: Convert to fraction form
   7,778.00/10,689.38 = 7,285.92/x
3. Step 3: Cross multiply
   7,778.00x = 10,689.38 × 7,285.92
4. Step 4: Simplify right side
   7,778.00x = 77,881,931.10
5. Step 5: Solve for x
   x = 77,881,931.10/7,778.00
6. Step 6: Final answer
   x = 10,013.11