Finding the Fourth Proportional to 10,085.42, 15,131.22 and 5,158.52

Step by Step Solution

1. Step 1: Write the proportion equation
   10,085.42 : 15,131.22 = 5,158.52 : x
2. Step 2: Convert to fraction form
   10,085.42/15,131.22 = 5,158.52/x
3. Step 3: Cross multiply
   10,085.42x = 15,131.22 × 5,158.52
4. Step 4: Simplify right side
   10,085.42x = 78,054,700.99
5. Step 5: Solve for x
   x = 78,054,700.99/10,085.42
6. Step 6: Final answer
   x = 7,739.36