Finding the Fourth Proportional to 15,307.84, 21,124.56 and 9,019.12

Step by Step Solution

1. Step 1: Write the proportion equation
   15,307.84 : 21,124.56 = 9,019.12 : x
2. Step 2: Convert to fraction form
   15,307.84/21,124.56 = 9,019.12/x
3. Step 3: Cross multiply
   15,307.84x = 21,124.56 × 9,019.12
4. Step 4: Simplify right side
   15,307.84x = 190,524,941.59
5. Step 5: Solve for x
   x = 190,524,941.59/15,307.84
6. Step 6: Final answer
   x = 12,446.23