Finding the Fourth Proportional to 7,607.10, 10,665.30 and 7,607.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,607.10 : 10,665.30 = 7,607.10 : x
2. Step 2: Convert to fraction form
   7,607.10/10,665.30 = 7,607.10/x
3. Step 3: Cross multiply
   7,607.10x = 10,665.30 × 7,607.10
4. Step 4: Simplify right side
   7,607.10x = 81,132,003.63
5. Step 5: Solve for x
   x = 81,132,003.63/7,607.10
6. Step 6: Final answer
   x = 10,665.30