Finding the Fourth Proportional to 13,123.32, 18,105.30 and 8,410.20

Step by Step Solution

1. Step 1: Write the proportion equation
   13,123.32 : 18,105.30 = 8,410.20 : x
2. Step 2: Convert to fraction form
   13,123.32/18,105.30 = 8,410.20/x
3. Step 3: Cross multiply
   13,123.32x = 18,105.30 × 8,410.20
4. Step 4: Simplify right side
   13,123.32x = 152,269,194.06
5. Step 5: Solve for x
   x = 152,269,194.06/13,123.32
6. Step 6: Final answer
   x = 11,602.95