Finding the Fourth Proportional to 9,065.41, 12,509.42 and 5,085.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,065.41 : 12,509.42 = 5,085.74 : x
2. Step 2: Convert to fraction form
   9,065.41/12,509.42 = 5,085.74/x
3. Step 3: Cross multiply
   9,065.41x = 12,509.42 × 5,085.74
4. Step 4: Simplify right side
   9,065.41x = 63,619,663.52
5. Step 5: Solve for x
   x = 63,619,663.52/9,065.41
6. Step 6: Final answer
   x = 7,017.85