Finding the Fourth Proportional to 15,842.25, 21,842.42 and 10,166.99

Step by Step Solution

1. Step 1: Write the proportion equation
   15,842.25 : 21,842.42 = 10,166.99 : x
2. Step 2: Convert to fraction form
   15,842.25/21,842.42 = 10,166.99/x
3. Step 3: Cross multiply
   15,842.25x = 21,842.42 × 10,166.99
4. Step 4: Simplify right side
   15,842.25x = 222,071,505.67
5. Step 5: Solve for x
   x = 222,071,505.67/15,842.25
6. Step 6: Final answer
   x = 14,017.67