Finding the Fourth Proportional to 30,478.56, 42,086.37 and 19,166.99

Step by Step Solution

1. Step 1: Write the proportion equation
   30,478.56 : 42,086.37 = 19,166.99 : x
2. Step 2: Convert to fraction form
   30,478.56/42,086.37 = 19,166.99/x
3. Step 3: Cross multiply
   30,478.56x = 42,086.37 × 19,166.99
4. Step 4: Simplify right side
   30,478.56x = 806,669,032.93
5. Step 5: Solve for x
   x = 806,669,032.93/30,478.56
6. Step 6: Final answer
   x = 26,466.77