Finding the Fourth Proportional to 30,806.56, 42,513 and 17,377.78

Step by Step Solution

1. Step 1: Write the proportion equation
   30,806.56 : 42,513 = 17,377.78 : x
2. Step 2: Convert to fraction form
   30,806.56/42,513 = 17,377.78/x
3. Step 3: Cross multiply
   30,806.56x = 42,513 × 17,377.78
4. Step 4: Simplify right side
   30,806.56x = 738,781,561.14
5. Step 5: Solve for x
   x = 738,781,561.14/30,806.56
6. Step 6: Final answer
   x = 23,981.31