Finding the Fourth Proportional to 13,085.05, 18,051.01 and 7,776.11

Step by Step Solution

1. Step 1: Write the proportion equation
   13,085.05 : 18,051.01 = 7,776.11 : x
2. Step 2: Convert to fraction form
   13,085.05/18,051.01 = 7,776.11/x
3. Step 3: Cross multiply
   13,085.05x = 18,051.01 × 7,776.11
4. Step 4: Simplify right side
   13,085.05x = 140,366,549.12
5. Step 5: Solve for x
   x = 140,366,549.12/13,085.05
6. Step 6: Final answer
   x = 10,727.25