Finding the Fourth Proportional to 30,545.39, 42,152.64 and 18,608.72

Step by Step Solution

1. Step 1: Write the proportion equation
   30,545.39 : 42,152.64 = 18,608.72 : x
2. Step 2: Convert to fraction form
   30,545.39/42,152.64 = 18,608.72/x
3. Step 3: Cross multiply
   30,545.39x = 42,152.64 × 18,608.72
4. Step 4: Simplify right side
   30,545.39x = 784,406,780.40
5. Step 5: Solve for x
   x = 784,406,780.40/30,545.39
6. Step 6: Final answer
   x = 25,680.04