Finding the Fourth Proportional to 13,759.34, 18,987.96 and 7,471.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,759.34 : 18,987.96 = 7,471.71 : x
2. Step 2: Convert to fraction form
   13,759.34/18,987.96 = 7,471.71/x
3. Step 3: Cross multiply
   13,759.34x = 18,987.96 × 7,471.71
4. Step 4: Simplify right side
   13,759.34x = 141,872,530.61
5. Step 5: Solve for x
   x = 141,872,530.61/13,759.34
6. Step 6: Final answer
   x = 10,311.00