Finding the Fourth Proportional to 15,460.63, 21,335.52 and 8,387.05

Step by Step Solution

1. Step 1: Write the proportion equation
   15,460.63 : 21,335.52 = 8,387.05 : x
2. Step 2: Convert to fraction form
   15,460.63/21,335.52 = 8,387.05/x
3. Step 3: Cross multiply
   15,460.63x = 21,335.52 × 8,387.05
4. Step 4: Simplify right side
   15,460.63x = 178,942,073.02
5. Step 5: Solve for x
   x = 178,942,073.02/15,460.63
6. Step 6: Final answer
   x = 11,574.05