Finding the Fourth Proportional to 35,581.10, 53,380.89 and 10,621.15

Step by Step Solution

1. Step 1: Write the proportion equation
   35,581.10 : 53,380.89 = 10,621.15 : x
2. Step 2: Convert to fraction form
   35,581.10/53,380.89 = 10,621.15/x
3. Step 3: Cross multiply
   35,581.10x = 53,380.89 × 10,621.15
4. Step 4: Simplify right side
   35,581.10x = 566,966,439.82
5. Step 5: Solve for x
   x = 566,966,439.82/35,581.10
6. Step 6: Final answer
   x = 15,934.48