Finding the Fourth Proportional to 39,494.50, 54,502.41 and 21,830.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,494.50 : 54,502.41 = 21,830.50 : x
2. Step 2: Convert to fraction form
   39,494.50/54,502.41 = 21,830.50/x
3. Step 3: Cross multiply
   39,494.50x = 54,502.41 × 21,830.50
4. Step 4: Simplify right side
   39,494.50x = 1,189,814,861.51
5. Step 5: Solve for x
   x = 1,189,814,861.51/39,494.50
6. Step 6: Final answer
   x = 30,126.09