Finding the Fourth Proportional to 30,699.49, 42,370.48 and 17,776.89

Step by Step Solution

1. Step 1: Write the proportion equation
   30,699.49 : 42,370.48 = 17,776.89 : x
2. Step 2: Convert to fraction form
   30,699.49/42,370.48 = 17,776.89/x
3. Step 3: Cross multiply
   30,699.49x = 42,370.48 × 17,776.89
4. Step 4: Simplify right side
   30,699.49x = 753,215,061.47
5. Step 5: Solve for x
   x = 753,215,061.47/30,699.49
6. Step 6: Final answer
   x = 24,535.10