Finding the Fourth Proportional to 30,725.95, 42,422.20 and 19,258.10

Step by Step Solution

1. Step 1: Write the proportion equation
   30,725.95 : 42,422.20 = 19,258.10 : x
2. Step 2: Convert to fraction form
   30,725.95/42,422.20 = 19,258.10/x
3. Step 3: Cross multiply
   30,725.95x = 42,422.20 × 19,258.10
4. Step 4: Simplify right side
   30,725.95x = 816,970,969.82
5. Step 5: Solve for x
   x = 816,970,969.82/30,725.95
6. Step 6: Final answer
   x = 26,588.96