Finding the Fourth Proportional to 13,589.31, 18,754.14 and 7,621.35

Step by Step Solution

1. Step 1: Write the proportion equation
   13,589.31 : 18,754.14 = 7,621.35 : x
2. Step 2: Convert to fraction form
   13,589.31/18,754.14 = 7,621.35/x
3. Step 3: Cross multiply
   13,589.31x = 18,754.14 × 7,621.35
4. Step 4: Simplify right side
   13,589.31x = 142,931,864.89
5. Step 5: Solve for x
   x = 142,931,864.89/13,589.31
6. Step 6: Final answer
   x = 10,517.96