Finding the Fourth Proportional to 13,039.86, 19,526.40 and 7,189.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,039.86 : 19,526.40 = 7,189.98 : x
2. Step 2: Convert to fraction form
   13,039.86/19,526.40 = 7,189.98/x
3. Step 3: Cross multiply
   13,039.86x = 19,526.40 × 7,189.98
4. Step 4: Simplify right side
   13,039.86x = 140,394,425.47
5. Step 5: Solve for x
   x = 140,394,425.47/13,039.86
6. Step 6: Final answer
   x = 10,766.56