Finding the Fourth Proportional to 7,100.31, 10,643.58 and 3,981.81

Step by Step Solution

1. Step 1: Write the proportion equation
   7,100.31 : 10,643.58 = 3,981.81 : x
2. Step 2: Convert to fraction form
   7,100.31/10,643.58 = 3,981.81/x
3. Step 3: Cross multiply
   7,100.31x = 10,643.58 × 3,981.81
4. Step 4: Simplify right side
   7,100.31x = 42,380,713.28
5. Step 5: Solve for x
   x = 42,380,713.28/7,100.31
6. Step 6: Final answer
   x = 5,968.85