Finding the Fourth Proportional to 15,582.51, 21,499.83 and 9,914.94

Step by Step Solution

1. Step 1: Write the proportion equation
   15,582.51 : 21,499.83 = 9,914.94 : x
2. Step 2: Convert to fraction form
   15,582.51/21,499.83 = 9,914.94/x
3. Step 3: Cross multiply
   15,582.51x = 21,499.83 × 9,914.94
4. Step 4: Simplify right side
   15,582.51x = 213,169,524.46
5. Step 5: Solve for x
   x = 213,169,524.46/15,582.51
6. Step 6: Final answer
   x = 13,680.05