Finding the Fourth Proportional to 10,643.56, 15,972.54 and 3,718.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,643.56 : 15,972.54 = 3,718.12 : x
2. Step 2: Convert to fraction form
   10,643.56/15,972.54 = 3,718.12/x
3. Step 3: Cross multiply
   10,643.56x = 15,972.54 × 3,718.12
4. Step 4: Simplify right side
   10,643.56x = 59,387,820.42
5. Step 5: Solve for x
   x = 59,387,820.42/10,643.56
6. Step 6: Final answer
   x = 5,579.70