Finding the Fourth Proportional to 11,900.10, 17,820.98 and 8,381.46

Step by Step Solution

1. Step 1: Write the proportion equation
   11,900.10 : 17,820.98 = 8,381.46 : x
2. Step 2: Convert to fraction form
   11,900.10/17,820.98 = 8,381.46/x
3. Step 3: Cross multiply
   11,900.10x = 17,820.98 × 8,381.46
4. Step 4: Simplify right side
   11,900.10x = 149,365,831.03
5. Step 5: Solve for x
   x = 149,365,831.03/11,900.10
6. Step 6: Final answer
   x = 12,551.65