Finding the Fourth Proportional to 15,435.30, 21,300.71 and 8,361.72

Step by Step Solution

1. Step 1: Write the proportion equation
   15,435.30 : 21,300.71 = 8,361.72 : x
2. Step 2: Convert to fraction form
   15,435.30/21,300.71 = 8,361.72/x
3. Step 3: Cross multiply
   15,435.30x = 21,300.71 × 8,361.72
4. Step 4: Simplify right side
   15,435.30x = 178,110,572.82
5. Step 5: Solve for x
   x = 178,110,572.82/15,435.30
6. Step 6: Final answer
   x = 11,539.17