Finding the Fourth Proportional to 30,477.50, 42,063.42 and 18,538.53

Step by Step Solution

1. Step 1: Write the proportion equation
   30,477.50 : 42,063.42 = 18,538.53 : x
2. Step 2: Convert to fraction form
   30,477.50/42,063.42 = 18,538.53/x
3. Step 3: Cross multiply
   30,477.50x = 42,063.42 × 18,538.53
4. Step 4: Simplify right side
   30,477.50x = 779,793,973.57
5. Step 5: Solve for x
   x = 779,793,973.57/30,477.50
6. Step 6: Final answer
   x = 25,585.89