Finding the Fourth Proportional to 30,022.79, 45,030.53 and 12,490.34

Step by Step Solution

1. Step 1: Write the proportion equation
   30,022.79 : 45,030.53 = 12,490.34 : x
2. Step 2: Convert to fraction form
   30,022.79/45,030.53 = 12,490.34/x
3. Step 3: Cross multiply
   30,022.79x = 45,030.53 × 12,490.34
4. Step 4: Simplify right side
   30,022.79x = 562,446,436.15
5. Step 5: Solve for x
   x = 562,446,436.15/30,022.79
6. Step 6: Final answer
   x = 18,733.99