Finding the Fourth Proportional to 15,300.06, 21,112.56 and 9,333.20

Step by Step Solution

1. Step 1: Write the proportion equation
   15,300.06 : 21,112.56 = 9,333.20 : x
2. Step 2: Convert to fraction form
   15,300.06/21,112.56 = 9,333.20/x
3. Step 3: Cross multiply
   15,300.06x = 21,112.56 × 9,333.20
4. Step 4: Simplify right side
   15,300.06x = 197,047,639.43
5. Step 5: Solve for x
   x = 197,047,639.43/15,300.06
6. Step 6: Final answer
   x = 12,878.88