Finding the Fourth Proportional to 9,991.59, 14,954.43 and 8,898.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,991.59 : 14,954.43 = 8,898.09 : x
2. Step 2: Convert to fraction form
   9,991.59/14,954.43 = 8,898.09/x
3. Step 3: Cross multiply
   9,991.59x = 14,954.43 × 8,898.09
4. Step 4: Simplify right side
   9,991.59x = 133,065,864.04
5. Step 5: Solve for x
   x = 133,065,864.04/9,991.59
6. Step 6: Final answer
   x = 13,317.79