Finding the Fourth Proportional to 14,059.71, 21,086.73 and 5,172.03

Step by Step Solution

1. Step 1: Write the proportion equation
   14,059.71 : 21,086.73 = 5,172.03 : x
2. Step 2: Convert to fraction form
   14,059.71/21,086.73 = 5,172.03/x
3. Step 3: Cross multiply
   14,059.71x = 21,086.73 × 5,172.03
4. Step 4: Simplify right side
   14,059.71x = 109,061,200.16
5. Step 5: Solve for x
   x = 109,061,200.16/14,059.71
6. Step 6: Final answer
   x = 7,757.00