Finding the Fourth Proportional to 11,990.15, 17,994.41 and 8,472.59

Step by Step Solution

1. Step 1: Write the proportion equation
   11,990.15 : 17,994.41 = 8,472.59 : x
2. Step 2: Convert to fraction form
   11,990.15/17,994.41 = 8,472.59/x
3. Step 3: Cross multiply
   11,990.15x = 17,994.41 × 8,472.59
4. Step 4: Simplify right side
   11,990.15x = 152,459,258.22
5. Step 5: Solve for x
   x = 152,459,258.22/11,990.15
6. Step 6: Final answer
   x = 12,715.38