Finding the Fourth Proportional to 30,868.27, 42,582.56 and 19,518.64

Step by Step Solution

1. Step 1: Write the proportion equation
   30,868.27 : 42,582.56 = 19,518.64 : x
2. Step 2: Convert to fraction form
   30,868.27/42,582.56 = 19,518.64/x
3. Step 3: Cross multiply
   30,868.27x = 42,582.56 × 19,518.64
4. Step 4: Simplify right side
   30,868.27x = 831,153,454.87
5. Step 5: Solve for x
   x = 831,153,454.87/30,868.27
6. Step 6: Final answer
   x = 26,925.82