Finding the Fourth Proportional to 30,502.01, 42,093.94 and 16,891.78

Step by Step Solution

1. Step 1: Write the proportion equation
   30,502.01 : 42,093.94 = 16,891.78 : x
2. Step 2: Convert to fraction form
   30,502.01/42,093.94 = 16,891.78/x
3. Step 3: Cross multiply
   30,502.01x = 42,093.94 × 16,891.78
4. Step 4: Simplify right side
   30,502.01x = 711,041,573.81
5. Step 5: Solve for x
   x = 711,041,573.81/30,502.01
6. Step 6: Final answer
   x = 23,311.30