Finding the Fourth Proportional to 9,071.35, 12,518.60 and 5,485.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,071.35 : 12,518.60 = 5,485.79 : x
2. Step 2: Convert to fraction form
   9,071.35/12,518.60 = 5,485.79/x
3. Step 3: Cross multiply
   9,071.35x = 12,518.60 × 5,485.79
4. Step 4: Simplify right side
   9,071.35x = 68,674,410.69
5. Step 5: Solve for x
   x = 68,674,410.69/9,071.35
6. Step 6: Final answer
   x = 7,570.47