Finding the Fourth Proportional to 30,930.90, 42,686.70 and 17,502.72

Step by Step Solution

1. Step 1: Write the proportion equation
   30,930.90 : 42,686.70 = 17,502.72 : x
2. Step 2: Convert to fraction form
   30,930.90/42,686.70 = 17,502.72/x
3. Step 3: Cross multiply
   30,930.90x = 42,686.70 × 17,502.72
4. Step 4: Simplify right side
   30,930.90x = 747,133,357.82
5. Step 5: Solve for x
   x = 747,133,357.82/30,930.90
6. Step 6: Final answer
   x = 24,154.92