Finding the Fourth Proportional to 7,718.10, 10,834.50 and 7,718.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,718.10 : 10,834.50 = 7,718.10 : x
2. Step 2: Convert to fraction form
   7,718.10/10,834.50 = 7,718.10/x
3. Step 3: Cross multiply
   7,718.10x = 10,834.50 × 7,718.10
4. Step 4: Simplify right side
   7,718.10x = 83,621,754.45
5. Step 5: Solve for x
   x = 83,621,754.45/7,718.10
6. Step 6: Final answer
   x = 10,834.50