Finding the Fourth Proportional to 13,538.90, 18,682.83 and 7,571.00

Step by Step Solution

1. Step 1: Write the proportion equation
   13,538.90 : 18,682.83 = 7,571.00 : x
2. Step 2: Convert to fraction form
   13,538.90/18,682.83 = 7,571.00/x
3. Step 3: Cross multiply
   13,538.90x = 18,682.83 × 7,571.00
4. Step 4: Simplify right side
   13,538.90x = 141,447,612.52
5. Step 5: Solve for x
   x = 141,447,612.52/13,538.90
6. Step 6: Final answer
   x = 10,447.50