Finding the Fourth Proportional to 14,485.89, 19,991.63 and 8,112.15

Step by Step Solution

1. Step 1: Write the proportion equation
   14,485.89 : 19,991.63 = 8,112.15 : x
2. Step 2: Convert to fraction form
   14,485.89/19,991.63 = 8,112.15/x
3. Step 3: Cross multiply
   14,485.89x = 19,991.63 × 8,112.15
4. Step 4: Simplify right side
   14,485.89x = 162,175,060.74
5. Step 5: Solve for x
   x = 162,175,060.74/14,485.89
6. Step 6: Final answer
   x = 11,195.38