Finding the Fourth Proportional to 10,081.99, 15,126.06 and 5,155.09

Step by Step Solution

1. Step 1: Write the proportion equation
   10,081.99 : 15,126.06 = 5,155.09 : x
2. Step 2: Convert to fraction form
   10,081.99/15,126.06 = 5,155.09/x
3. Step 3: Cross multiply
   10,081.99x = 15,126.06 × 5,155.09
4. Step 4: Simplify right side
   10,081.99x = 77,976,200.65
5. Step 5: Solve for x
   x = 77,976,200.65/10,081.99
6. Step 6: Final answer
   x = 7,734.21