Finding the Fourth Proportional to 12,086.35, 18,129.12 and 4,970.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,086.35 : 18,129.12 = 4,970.34 : x
2. Step 2: Convert to fraction form
   12,086.35/18,129.12 = 4,970.34/x
3. Step 3: Cross multiply
   12,086.35x = 18,129.12 × 4,970.34
4. Step 4: Simplify right side
   12,086.35x = 90,107,831.16
5. Step 5: Solve for x
   x = 90,107,831.16/12,086.35
6. Step 6: Final answer
   x = 7,455.34