Finding the Fourth Proportional to 30,551.63, 42,162.42 and 17,123.15

Step by Step Solution

1. Step 1: Write the proportion equation
   30,551.63 : 42,162.42 = 17,123.15 : x
2. Step 2: Convert to fraction form
   30,551.63/42,162.42 = 17,123.15/x
3. Step 3: Cross multiply
   30,551.63x = 42,162.42 × 17,123.15
4. Step 4: Simplify right side
   30,551.63x = 721,953,374.48
5. Step 5: Solve for x
   x = 721,953,374.48/30,551.63
6. Step 6: Final answer
   x = 23,630.60