Finding the Fourth Proportional to 15,419.30, 21,279.15 and 9,449.82

Step by Step Solution

1. Step 1: Write the proportion equation
   15,419.30 : 21,279.15 = 9,449.82 : x
2. Step 2: Convert to fraction form
   15,419.30/21,279.15 = 9,449.82/x
3. Step 3: Cross multiply
   15,419.30x = 21,279.15 × 9,449.82
4. Step 4: Simplify right side
   15,419.30x = 201,084,152.00
5. Step 5: Solve for x
   x = 201,084,152.00/15,419.30
6. Step 6: Final answer
   x = 13,041.07