Finding the Fourth Proportional to 10,189.90, 14,061.09 and 5,712.63

Step by Step Solution

1. Step 1: Write the proportion equation
   10,189.90 : 14,061.09 = 5,712.63 : x
2. Step 2: Convert to fraction form
   10,189.90/14,061.09 = 5,712.63/x
3. Step 3: Cross multiply
   10,189.90x = 14,061.09 × 5,712.63
4. Step 4: Simplify right side
   10,189.90x = 80,325,804.57
5. Step 5: Solve for x
   x = 80,325,804.57/10,189.90
6. Step 6: Final answer
   x = 7,882.88