Finding the Fourth Proportional to 30,870.08, 42,600.56 and 16,722.96

Step by Step Solution

1. Step 1: Write the proportion equation
   30,870.08 : 42,600.56 = 16,722.96 : x
2. Step 2: Convert to fraction form
   30,870.08/42,600.56 = 16,722.96/x
3. Step 3: Cross multiply
   30,870.08x = 42,600.56 × 16,722.96
4. Step 4: Simplify right side
   30,870.08x = 712,407,460.86
5. Step 5: Solve for x
   x = 712,407,460.86/30,870.08
6. Step 6: Final answer
   x = 23,077.60