Finding the Fourth Proportional to 30,976.71, 42,748.74 and 16,830.42

Step by Step Solution

1. Step 1: Write the proportion equation
   30,976.71 : 42,748.74 = 16,830.42 : x
2. Step 2: Convert to fraction form
   30,976.71/42,748.74 = 16,830.42/x
3. Step 3: Cross multiply
   30,976.71x = 42,748.74 × 16,830.42
4. Step 4: Simplify right side
   30,976.71x = 719,479,248.67
5. Step 5: Solve for x
   x = 719,479,248.67/30,976.71
6. Step 6: Final answer
   x = 23,226.46