Finding the Fourth Proportional to 17,945.69, 24,764.80 and 9,987.91

Step by Step Solution

1. Step 1: Write the proportion equation
   17,945.69 : 24,764.80 = 9,987.91 : x
2. Step 2: Convert to fraction form
   17,945.69/24,764.80 = 9,987.91/x
3. Step 3: Cross multiply
   17,945.69x = 24,764.80 × 9,987.91
4. Step 4: Simplify right side
   17,945.69x = 247,348,630.51
5. Step 5: Solve for x
   x = 247,348,630.51/17,945.69
6. Step 6: Final answer
   x = 13,783.18