Finding the Fourth Proportional to 30,688.78, 42,350.98 and 18,749.59

Step by Step Solution

1. Step 1: Write the proportion equation
   30,688.78 : 42,350.98 = 18,749.59 : x
2. Step 2: Convert to fraction form
   30,688.78/42,350.98 = 18,749.59/x
3. Step 3: Cross multiply
   30,688.78x = 42,350.98 × 18,749.59
4. Step 4: Simplify right side
   30,688.78x = 794,063,511.10
5. Step 5: Solve for x
   x = 794,063,511.10/30,688.78
6. Step 6: Final answer
   x = 25,874.72