Finding the Fourth Proportional to 30,688.61, 42,344.98 and 17,258.81

Step by Step Solution

1. Step 1: Write the proportion equation
   30,688.61 : 42,344.98 = 17,258.81 : x
2. Step 2: Convert to fraction form
   30,688.61/42,344.98 = 17,258.81/x
3. Step 3: Cross multiply
   30,688.61x = 42,344.98 × 17,258.81
4. Step 4: Simplify right side
   30,688.61x = 730,823,709.40
5. Step 5: Solve for x
   x = 730,823,709.40/30,688.61
6. Step 6: Final answer
   x = 23,814.17