Finding the Fourth Proportional to 8,623.42, 11,900.20 and 5,085.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,623.42 : 11,900.20 = 5,085.34 : x
2. Step 2: Convert to fraction form
   8,623.42/11,900.20 = 5,085.34/x
3. Step 3: Cross multiply
   8,623.42x = 11,900.20 × 5,085.34
4. Step 4: Simplify right side
   8,623.42x = 60,516,563.07
5. Step 5: Solve for x
   x = 60,516,563.07/8,623.42
6. Step 6: Final answer
   x = 7,017.70