Finding the Fourth Proportional to 13,510.77, 18,645.18 and 8,475.21

Step by Step Solution

1. Step 1: Write the proportion equation
   13,510.77 : 18,645.18 = 8,475.21 : x
2. Step 2: Convert to fraction form
   13,510.77/18,645.18 = 8,475.21/x
3. Step 3: Cross multiply
   13,510.77x = 18,645.18 × 8,475.21
4. Step 4: Simplify right side
   13,510.77x = 158,021,722.76
5. Step 5: Solve for x
   x = 158,021,722.76/13,510.77
6. Step 6: Final answer
   x = 11,695.98