Finding the Fourth Proportional to 13,555.88, 18,707.21 and 7,588.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,555.88 : 18,707.21 = 7,588.10 : x
2. Step 2: Convert to fraction form
   13,555.88/18,707.21 = 7,588.10/x
3. Step 3: Cross multiply
   13,555.88x = 18,707.21 × 7,588.10
4. Step 4: Simplify right side
   13,555.88x = 141,952,048.72
5. Step 5: Solve for x
   x = 141,952,048.72/13,555.88
6. Step 6: Final answer
   x = 10,471.63