Finding the Fourth Proportional to 30,123.37, 45,192.21 and 10,402.09

Step by Step Solution

1. Step 1: Write the proportion equation
   30,123.37 : 45,192.21 = 10,402.09 : x
2. Step 2: Convert to fraction form
   30,123.37/45,192.21 = 10,402.09/x
3. Step 3: Cross multiply
   30,123.37x = 45,192.21 × 10,402.09
4. Step 4: Simplify right side
   30,123.37x = 470,093,435.72
5. Step 5: Solve for x
   x = 470,093,435.72/30,123.37
6. Step 6: Final answer
   x = 15,605.61