Finding the Fourth Proportional to 11,945.98, 17,899.04 and 8,430.24

Step by Step Solution

1. Step 1: Write the proportion equation
   11,945.98 : 17,899.04 = 8,430.24 : x
2. Step 2: Convert to fraction form
   11,945.98/17,899.04 = 8,430.24/x
3. Step 3: Cross multiply
   11,945.98x = 17,899.04 × 8,430.24
4. Step 4: Simplify right side
   11,945.98x = 150,893,291.17
5. Step 5: Solve for x
   x = 150,893,291.17/11,945.98
6. Step 6: Final answer
   x = 12,631.30