Finding the Fourth Proportional to 30,543.15, 42,151.24 and 17,118.72

Step by Step Solution

1. Step 1: Write the proportion equation
   30,543.15 : 42,151.24 = 17,118.72 : x
2. Step 2: Convert to fraction form
   30,543.15/42,151.24 = 17,118.72/x
3. Step 3: Cross multiply
   30,543.15x = 42,151.24 × 17,118.72
4. Step 4: Simplify right side
   30,543.15x = 721,575,081.77
5. Step 5: Solve for x
   x = 721,575,081.77/30,543.15
6. Step 6: Final answer
   x = 23,624.78