Finding the Fourth Proportional to 7,730.10, 10,851.30 and 7,730.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,730.10 : 10,851.30 = 7,730.10 : x
2. Step 2: Convert to fraction form
   7,730.10/10,851.30 = 7,730.10/x
3. Step 3: Cross multiply
   7,730.10x = 10,851.30 × 7,730.10
4. Step 4: Simplify right side
   7,730.10x = 83,881,634.13
5. Step 5: Solve for x
   x = 83,881,634.13/7,730.10
6. Step 6: Final answer
   x = 10,851.30